or

Synoym, Definition, Related Contents for or

Hypernyms for or

Searched WordTypeDefinition
orna room in a hospital equipped for the performance of surgical operations
orna state in northwestern United States on the Pacific
or circuitna gate circuit in a computer that fires when any of its inputs fire
or elserin place of, or as an alternative to
or gatena gate circuit in a computer that fires when any of its inputs fire
or sor(of quantities) imprecise but fairly close to correct
orachnany of various herbaceous plants of the genus Atriplex that thrive in deserts and salt marshes
orachenany of various herbaceous plants of the genus Atriplex that thrive in deserts and salt marshes
oraclena shrine where an oracular god is consulted
oraclena prophecy (usually obscure or allegorical) revealed by a priest or priestess; believed to be infallible
oraclenan authoritative person who divines the future
oracle of apollon(Greek mythology) the oracle at Delphi where a priestess supposedly delivered messages from Apollo to those who sought advice; the messages were usually obscure or ambiguous
oracle of delphin(Greek mythology) the oracle at Delphi where a priestess supposedly delivered messages from Apollo to those who sought advice; the messages were usually obscure or ambiguous
oracularaof or relating to an oracle
oracularsresembling an oracle in obscurity of thought
oracularsobscurely prophetic
oradrtoward the mouth or oral region
oradexonna corticosteroid drug (trade names Decadron or Dexamethasone Intensol or Dexone or Hexadrol or Oradexon) used to treat allergies or inflammation
oralaa stage in psychosexual development when the child's interest is concentrated in the mouth; fixation at this stage is said to result in dependence, selfishness, and aggression
oralaof or involving the mouth or mouth region or the surface on which the mouth is located
oralaof or relating to or affecting or for use in the mouth
oralnan examination conducted by word of mouth
oralsusing speech rather than writing
oral cancernmalignant neoplasm of the lips of mouth; most common in men over the age of 60
oral cavitynthe opening through which food is taken in and vocalizations emerge
oral communicationn(language) communication by word of mouth
oral contraceptionncontraception achieved by taking oral contraceptive pills
oral contraceptivena contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception
oral contraceptive pillna contraceptive in the form of a pill containing estrogen and progestin to inhibit ovulation and so prevent conception
oral contractnan agreement that is not in writing and is not signed by the parties but is a real existing contract that lacks only the formal requirement of a memorandum to render it enforceable in litigation
oral examnan examination conducted by word of mouth
oral examinationnan examination conducted by word of mouth
oral fissurenthe opening through which food is taken in and vocalizations emerge
oral herpesncaused by herpes simplex virus type 1 (HSV-1)
oral personalityn(psychoanalysis) a personality characterized either by generous optimism or aggressive and ambitious selfishness; formed in early childhood by fixation during the oral stage of development
oral phasen(psychoanalysis) the first sexual and social stage of an infant's development; the mouth is the focus of the libido and satisfaction comes from suckling and chewing and biting
oral poliovirus vaccinenan oral vaccine (containing live but weakened poliovirus) that is given to provide immunity to poliomyelitis
oral presentationndelivering an address to a public audience
oral robertsnUnited States evangelist (born 1918)
oral sexnoral stimulation of the genitals
oral smearnalimentary tract smear of material obtained from the mouth
oral stagen(psychoanalysis) the first sexual and social stage of an infant's development; the mouth is the focus of the libido and satisfaction comes from suckling and chewing and biting
orallyrby spoken rather than written means
orallyr(of drugs) through the mouth rather than through injection
oranna port city in northwestern Algeria and the country's 2nd largest city
orangnlarge long-armed ape of Borneo and Sumatra having arboreal habits
orangenorange color or pigment; any of a range of colors between red and yellow
orangenround yellow to orange fruit of any of several citrus trees
orangena river in South Africa that flows generally westward to the Atlantic Ocean
orangenany citrus tree bearing oranges
orangenany pigment producing the orange color
orangesof the color between red and yellow; similar to the color of a ripe orange
orange balsamnNorth American annual plant with usually yellow or orange flowers; grows chiefly on wet rather acid soil
orange batna common bat of northwestern Australia having orange or yellow fur
orange daisynmat-forming herb of Turkestan with nearly double orange-yellow flowers
orange fleabanenmat-forming herb of Turkestan with nearly double orange-yellow flowers
orange free statena province in central South Africa that was colonized by the Boers; named Free State in 1997
orange grassnannual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers
orange groupna terrorist group of Protestants who oppose any political settlement with Irish nationalists; a paramilitary group that attacks Catholic interests in Northern Ireland
orange grovengrove of orange trees
orange hawkweednEuropean hawkweed having flower heads with bright orange-red rays; a troublesome weed especially as naturalized in northeastern North America; sometimes placed in genus Hieracium
orange horseshoe batna common bat of northwestern Australia having orange or yellow fur
orange juicenbottled or freshly squeezed juice of oranges
orange liqueurnliqueur flavored with orange
orange marmaladenmarmalade made from oranges
orange milkweednerect perennial of eastern and southern United States having showy orange flowers
orange milkwortnbog plant of pine barrens of southeastern United States having spikes of irregular yellow-orange flowers
orange mushroom pimplena variety of mushroom pimple
orange orderna Protestant political organization in Northern Ireland
orange peelnthe rind of an orange
orange peel fungusna discomycete with bright orange cup-shaped or saucer-shaped fruiting bodies and pale orange exteriors
orange pekoena superior grade of black tea; grown in India and Sri Lanka and Java
orange redna variable color that is vivid red but sometimes with an orange tinge
orange rindnthe rind of an orange
orange riverna river in South Africa that flows generally westward to the Atlantic Ocean
orange sneezeweednstout perennial herb of western United States having flower heads with drooping orange-yellow rays; causes spewing sickness in sheep
orange sodanorange-flavored carbonated drink
orange toastnbuttered toast with sugar and grated orange rind and a little orange juice
orange tortrixnCalifornia moth whose larvae live in especially oranges
orange treenany citrus tree bearing oranges
orange yellowna shade of yellow tinged with orange
orange zestntiny bits of orange peel
orangeadensweetened beverage of diluted orange juice
orange-blossom orchidndiminutive Australian orchid with loose racemes of fragrant white flowers with purple and orange markings on the lip
orange-brownsof brown tinged with orange
orange-coloredshaving the color or ripe oranges
orange-colouredshaving the color or ripe oranges
orange-floweredshaving orange flowers
orange-huedshaving the color or ripe oranges
orange-juice concentratenorange juice that has been concentrated and frozen
orangemanna member of a society founded in Ireland in 1795 to uphold Protestantism and the British sovereign
orangenessnorange color or pigment; any of a range of colors between red and yellow
orange-redsof red tinged with orange
orangeryna place where oranges are grown; a plantation of orange trees in warm climes or a greenhouse in cooler areas
orange-sizedshaving the approximate size of an orange
orangewoodnfine-grained wood of an orange tree; used in fine woodwork
orangishsof the color between red and yellow; similar to the color of a ripe orange
orangish-redsof red tinged with orange
orangutannlarge long-armed ape of Borneo and Sumatra having arboreal habits
orangutangnlarge long-armed ape of Borneo and Sumatra having arboreal habits
orasonena dehydrogenated analogue of cortisol (trade names Orasone or Deltasone or Liquid Pred or Meticorten); used as an anti-inflammatory drug in the treatment of arthritis and as an immunosuppressant
oratevtalk pompously
orationnan instance of oratory
oratorna person who delivers a speech or oration
oratoricalscharacteristic of an orator or oratory
oratoriona musical composition for voices and orchestra based on a religious text
oratorynaddressing an audience formally (usually a long and rhetorical address and often pompous)
orbnthe ball-shaped capsule containing the vertebrate eye
orbnan object with a spherical shape
orbvmove in an orbit
orb webna circular spider web
orbicularshaving the shape of a sphere or ball
orbicularscircular or nearly circular
orbiculatescircular or nearly circular
orbiculate leafncircular or nearly circular leaf
orbignyanpalms of southern Mexico to northern South America: babassu palm
orbignya cohunentropical American feather palm whose large nuts yield valuable oil and a kind of vegetable ivory
orbignya martianantall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivory
orbignya phaleratantall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivory
orbignya spesiosantall feather palm of northern Brazil with hard-shelled nuts yielding valuable oil and a kind of vegetable ivory
orbisonnUnited States composer and rockabilly tenor popular in the 1950s (1936-1988)
orbitnan area in which something acts or operates or has power or control:
orbitnthe bony cavity in the skull containing the eyeball
orbitnthe (usually elliptical) path described by one celestial body in its revolution about another
orbitnthe path of an electron around the nucleus of an atom
orbitna particular environment or walk of life
orbitvmove in an orbit
orbit periodnthe time it takes to complete one full orbit around a celestial body
orbitalaof or relating to the eye socket
orbitalaof or relating to an orbit
orbital cavitynthe bony cavity in the skull containing the eyeball
orbital motionnmotion of an object in an orbit around a fixed point
orbital planen(astronomy) the plane on which a body is orbiting
orbital pointnthe craniometric point at the lowest point on the lower edge of the orbit
orbital rotationnmotion of an object in an orbit around a fixed point
orbitalenthe craniometric point at the lowest point on the lower edge of the orbit
orbiternman-made equipment that orbits around the earth or the moon
orb-weavernspiders that spin orb webs; cosmopolitan in distribution
orb-weavingaof spiders who weave circular webs
orb-weaving spiderna spider that spins a circular (or near circular) web
orcanpredatory black-and-white toothed whale with large dorsal fin; common in cold seas
orchardngarden consisting of a small cultivated wood without undergrowth
orchard apple treennative Eurasian tree widely cultivated in many varieties for its firm rounded edible fruits
orchard grassnwidely grown stout Old World hay and pasture grass
orchard oriolenthe male is chestnut-and-black
orchestiantype genus of the family Orchestiidae
orchestiidaenbeach fleas
orchestranseating on the main floor in a theater
orchestrana musical organization consisting of a group of instrumentalists including string players
orchestra pitnlowered area in front of a stage where an orchestra accompanies the performers
orchestralarelating to or composed for an orchestra
orchestral bellsna percussion instrument consisting of a set of graduated metal bars mounted on a frame and played with small hammers
orchestratevplan and direct (a complex undertaking)
orchestratevwrite an orchestra score for
orchestratedaarranged for performance by an orchestra
orchestrationnthe act of arranging a piece of music for an orchestra and assigning parts to the different musical instruments
orchestrationnan arrangement of events that attempts to achieve a maximum effect
orchestrationnan arrangement of a piece of music for performance by an orchestra or band
orchestratornan arranger who writes for orchestras
orchidnany of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors
orchid cactusnany cactus of the genus Epiphyllum having flattened jointed irregularly branching stems and showy tubular flowers
orchid familynenormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers
orchid treensmall East Indian tree having orchidlike flowers and hard dark wood
orchidaceaenenormous cosmopolitan family of perennial terrestrial or epiphytic plants with fleshy tubers or rootstocks and unusual flowers
orchidaceous plantnany of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors
orchidalesnorder of plants with irregular flowers having minute seeds: Orchidaceae; Burmanniaceae
orchidalgianpain in the testes
orchidectomynsurgical removal of one or both testicles
orchidlikeshaving a flower that resembles an orchid
orchid-likeshaving a flower that resembles an orchid
orchiectomynsurgical removal of one or both testicles
orchilnany of various lecanoras that yield the dye archil
orchilna purplish dye obtained from orchil lichens
orchiopexynoperation to bring an undescended testicle into the scrotum
orchisnone of the two male reproductive glands that produce spermatozoa and secrete androgens
orchisnany of various deciduous terrestrial orchids having fleshy tubers and flowers in erect terminal racemes
orchis masculanEurasian orchid with showy pink or purple flowers in a loose spike
orchis papilionaceaenMediterranean orchid having usually purple flowers with a fan-shaped spotted or striped rose-red lip
orchis spectabilisnNorth American orchid having a spike of violet-purple flowers mixed with white; sepals and petals form a hood
orchitisninflammation of one or both testes; characterized by pain and swelling
orchotomynsurgical incision into the testis to obtain material for analysis (as in cases of abnormally low sperm count)
orcinusnkiller whales
orcinus orcanpredatory black-and-white toothed whale with large dorsal fin; common in cold seas
orcusngod of the underworld; counterpart of Greek Pluto
orczynBritish writer (born in Hungary) (1865-1947)
ord kangaroo ratnmost widely distributed kangaroo rat: plains and mountain areas of central and western United States
ordainvissue an order
ordainvappoint to a clerical posts
ordainvinvest with ministerial or priestly authority
ordainvorder by virtue of superior authority; decree
ordainedsinvested with ministerial or priestly functions
ordainedsfixed or established especially by order or command
ordainerna cleric who ordains; a cleric who admits someone to holy orders
ordealna primitive method of determining a person's guilt or innocence by subjecting the accused person to dangerous or painful tests believed to be under divine control; escape was usually taken as a sign of innocence
ordealna severe or trying experience
ordeal beanndark brown highly poisonous seed of the calabar-bean vine; source of physostigmine and used in native witchcraft
ordeal treenevergreen shrub or tree of South Africa
ordernthe act of putting things in a sequential arrangement
ordern(architecture) one of original three styles of Greek architecture distinguished by the type of column and entablature used or a style developed from the original three by the Romans
orderna degree in a continuum of size or quantity
orderna commercial document used to request someone to supply something in return for payment and providing specifications and quantities
orderna legally binding command or decision entered on the court record (as if issued by a court or judge)
orderna body of rules followed by an assembly
ordern(often plural) a command given by a superior (e.g., a military or law enforcement officer) that must be obeyed
orderna request for food or refreshment (as served in a restaurant or bar etc.)
ordern(biology) taxonomic group containing one or more families
orderna group of person living under a religious rule
orderna formal association of people with similar interests
ordernlogical or comprehensible arrangement of separate elements
ordern(usually plural) the status or rank or office of a Christian clergyman in an ecclesiastical hierarchy
ordernestablished customary state (especially of society)
orderna condition of regular or proper arrangement
ordervplace in a certain order
ordervbring order to or into
ordervassign a rank or rating to
ordervarrange thoughts, ideas, temporal events
ordervmake a request for something
ordervgive instructions to or direct somebody to do something with authority
ordervissue commands or orders for
ordervappoint to a clerical posts
ordervbring into conformity with rules or principles or usage; impose regulations
order acarinanmites and ticks
order accipitriformesnin some classifications an alternative name for the Falconiformes
order actinariansea anemones
order actiniariansea anemones
order actinomycetalesnfilamentous or rod-shaped bacteria
order actinomyxidianparasites of worms
order aepyorniformesnhuge extinct flightless birds: elephant birds
order agaricalesntypical gilled mushrooms belonging to the subdivision Basidiomycota
order alcyonariancorals and sea anemones having eight branches
order alismalesnan order of aquatic monocotyledonous herbaceous plants
order amoebidanthe animal order including amoebas
order amoebinanthe animal order including amoebas
order amphipodansmall flat-bodied semiterrestrial crustaceans: whale lice; sand-hoppers; skeleton shrimp
order anacanthininat least partially equivalent to the order Gadiformes in some classifications
order anaspidanextinct order of jawless vertebrates
order andreaealesncomprises a single genus: Andreaea
order anguilliformesnelongate fishes with pelvic fins and girdle absent or reduced
order anopluransucking lice
order anostracansmall aquatic crustaceans lacking a carapace: fairy shrimps; brine shrimps
order anseriformesnducks; geese; swans; screamers
order anthocerotalesnhornworts; liverworts having a thalloid gametophyte; in some classification systems included in the class Hepaticopsida
order anuranfrogs, toads, tree toads
order aphyllophoralesnincludes chiefly saprophytic fungi typically with shelflike bodies; sometimes placed in class Hymenomycetes or included in Agaricales
order aplacophoranan order of Amphineura
order apodesnelongate fishes with pelvic fins and girdle absent or reduced
order apodiformesnswifts; hummingbirds
order apterygiformesna ratite bird order: flightless ground birds having vestigial wings and long bills and small eyes: kiwis
order aralesnAraceae; Lemnaceae
order araneaenspiders
order araneidanspiders
order aristolochialesnorder of plants distinguished by tubular petaloid perianth and inferior ovary
order armsna position in the manual of arms; the rifle is held vertically on the right side with the butt on the ground; often used as a command
order artiodactylanan order of hooved mammals of the subclass Eutheria (including pigs and peccaries and hippopotami and members of the suborder Ruminantia) having an even number of functional toes
order aspergillalesnorder of fungi having a closed ascocarp (cleistothecium) with the asci scattered rather than gathered in a hymenium
order auricularialesncoextensive with the family Auriculariaceae; sometimes included in the order Tremellales
order batoideinfish with dorsoventrally flattened bodies; includes: rays; skates; guitarfishes; sawfishes
order batrachianfrogs, toads, tree toads
order belemnoideanorder of extinct dibranchiate cephalopods related to the surviving spirulas
order bennettitalesnfossil gymnospermous plants of the Carboniferous
order berycomorphinan order of spiny-finned fish in the superorder Acanthopterygii
order blastocladialesnfungi that carry out asexual reproduction by thick-walled resting spores that produce zoospores upon germination; sometimes placed in class Oomycetes
order bookna book in which customers' orders are entered; usually makes multiple copies of the order
order bookna printed copy of the order of the day
order branchiurancopepods with suctorial mouthparts; parasitic on fishes
order bryalesncategory used in some classification systems for mosses having the spore case separated from the capsule wall by a hollow intercellular space
order campanulalesnan order or plants of the subclass Asteridae including: Campanulaceae; Lobeliaceae; Cucurbitaceae; Goodeniaceae; Compositae
order caprimulgiformesngoatsuckers; frogmouths; oilbirds
order carnivorancats; lions; tigers; panthers; dogs; wolves; jackals; bears; raccoons; skunks; and members of the suborder Pinnipedia
order caryophyllalesncorresponds approximately to the older group Centrospermae
order casuariiformesna ratite bird order: cassowaries and emus
order casuarinalesnorder of chiefly Australian trees and shrubs comprising the casuarinas; 1 family: Casuarinaceae
order caudatansalamanders; newts; congo snakes
order cestidanctenophore having short tentacles; one family
order cetaceanan order of Eutheria
order charadriiformesnlarge diverse order of aquatic birds found along seacoasts and inland waters: shorebirds and coastal diving birds; most feed on anima life
order charalesnsmall order of macroscopic fresh and brackish water algae with a distinct axis: stoneworts
order chelonethidanfalse scorpions
order cheloniantortoises and turtles
order chiropteranan old order dating to early Eocene: bats: suborder Megachiroptera (fruit bats); suborder Microchiroptera (insectivorous bats)
order chlorococcalesnunicellular green algae that reproduce by spores
order chytridialesnsimple aquatic fungi mostly saprophytic but some parasitic on higher plants or animals or fresh water fungi; sometimes placed in class Oomycetes
order ciconiiformesnorder of chiefly tropical marsh-dwelling fish-eating wading birds with long legs and bills and (except for flamingos) unwebbed feet: herons; storks; spoonbills; flamingos; ibises
order cilioflagellatanin some classifications considered a phylum of the kingdom Protista; in others included in the plant phylum Pyrrophyta
order coccidianan order in the subclass Telosporidia
order codenthe portion of a set of operation descriptions that specifies the operation to be performed; the set of operations in a computer
order coleopteranbeetles
order collembolanminute wingless arthropods: springtails
order columbiformesnsand grouse; pigeons; doves; extinct dodos and solitaires
order colymbiformesngrebes
order commelinalesnan order of monocotyledonous herbs
order coniferalesnprofusely branching and chiefly evergreen trees and some shrubs having narrow or needlelike leaves
order conodontanextinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications considered a separate phylum
order conodontophoridanextinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications considered a separate phylum
order coraciiformesnrollers; kingfishers; hornbills; hoopoes; motmots; bee eaters; todies
order cordaitalesnextinct plants having tall arborescent trunks comparable to or more advanced than cycads; known from the Pennsylvanian period; probably extinct since the Mesozoic era
order corrodentianan order of insects: includes booklice and bark-lice
order crocodiliancrocodiles; alligators; caimans; gavials
order crocodyliancrocodiles; alligators; caimans; gavials
order cuculiformesncuckoos; touracos; etc.
order cycadalesnprimitive tropical gymnosperms abundant in the Mesozoic, now reduced to a few scattered tropical forms
order cycadofilicalesnfossil gymnospermous trees or climbing plants from the Devonian: seed ferns
order cyclostomatanprimitive jawless aquatic vertebrate: lampreys; hagfishes
order cydippeanctenophores having two long pinnate tentacles
order cydippidanctenophores having two long pinnate tentacles
order cydippideanctenophores having two long pinnate tentacles
order cypriniformesnan order of animals including almost entirely freshwater fishes: characins; loaches; carp; suckers; sometimes classified as a suborder of Ostariophysi
order decapodansquids and cuttlefishes
order decapodanlobsters; crayfish; crabs; shrimps; prawns
order dermapteranearwigs and a few related forms
order dermopteranflying lemurs
order diapensialesnused in some classifications: coextensive with family Diapensiaceae
order dicranalesnwidely distributed order of mosses with erect gametophores and sporophytes at the tips of stems
order dictyopteranin some classifications replaced by the orders (here suborders) Blattodea (cockroaches) and Manteodea (mantids); in former classifications often subsumed under a much broader order Orthoptera
order dinoceratansmall order of primitive ungulates of the Paleocene and Eocene
order dinoflagellatanin some classifications considered a phylum of the kingdom Protista; in others included in the plant phylum Pyrrophyta
order dinornithiformesna ratite bird order: recently extinct flightless birds of New Zealand
order dipterana large order of insects having a single pair of wings and sucking or piercing mouths; includes true flies and mosquitoes and gnats and crane flies
order discocephalinsmall order of fishes comprising the remoras
order ebenalesntrees or shrubs of the families Ebenaceae or Sapotaceae or Styracaceae or Symplocaceae
order edentatanorder of mammals having few or no teeth including: New World anteaters; sloths; armadillos
order embiodeanweb spinners
order embiopteranweb spinners
order endomycetalesnfungi having a zygote or a single cell developing directly into an ascus
order entomophthoralesncoextensive with the family Entomophthoraceae
order ephemeridanmayflies
order ephemeropteranmayflies
order equisetalesnlower tracheophytes in existence since the Devonian
order ericalesnEricaceae; Clethraceae; Diapensiaceae; Epacridaceae; Lennoaceae; Pyrolaceae; Monotropaceae
order erysiphalesnsaprophytic and parasitic fungi that live on plants
order eubacterialesnone of two usually recognized orders of true bacteria; Gram-positive spherical or rod-shaped forms; some are motile; in some classifications considered an order of Schizomycetes
order eubryalesnmosses with perennial erect gametophores and stems with rows of leaves and drooping capsules
order euphausiaceansmall commonly luminescent crustaceans; important element of marine plankton: krill
order eurotialesnorder of fungi having a closed ascocarp (cleistothecium) with the asci scattered rather than gathered in a hymenium
order eurypteridanextinct aquatic arthropods of the Paleozoic
order exocycloidanflat sea urchins
order fagalesnan order of dicotyledonous trees of the subclass Hamamelidae
order falconiformesnchiefly diurnal carnivorous birds having hooked beaks and long talons with opposable hind toe: falcons; hawks; eagles; ospreys; caracaras; vultures
order filicalesntrue (leptosporangiate) ferns
order foraminiferanforaminifers
order formna form to use when placing an order
order fucalesncoextensive with the family Fucaceae
order gadiformesncods, haddocks, grenadiers; in some classifications considered equivalent to the order Anacanthini
order galliformesnpheasants; turkeys; grouse; partridges; quails; chickens; brush turkeys; curassows; hoatzins
order ganoideina group of mostly extinct primitive bony fishes characterized by armor-like bony scales
order gaviiformesnlarge aquatic birds: loons and some extinct forms
order gentianalesnan order of dicotyledonous plants having gamopetalous flowers; Gentianaceae; Apocynaceae; Asclepiadaceae; Loganiaceae; Oleaceae; Salvadoraceae
order geophilomorphansmall elongate centipedes living in soil and under stones and having more than 30 pairs of legs
order geranialesnan order of plants of subclass Rosidae including geraniums and many other plants; see Euphorbiaceae; Geraniaceae; Rutaceae; Malpighiaceae; Simaroubaceae; Meliaceae; Zygophyllaceae; Tropaeolaceae
order ginkgoalesncoextensive with the family Ginkgoaceae: plants that first appeared in the Permian and now represented by a single surviving species; often included in Coniferales
order gnetalesnchiefly tropical or xerophytic woody plants; practically unknown as fossils but considered close to the ancestral line of angiosperms
order graminalesngrasses; sedges; rushes
order gregarinidanan order in the subclass Telosporidia
order gruiformesninland marsh-dwelling birds with long legs and necks and bills that wade in water in search of food: cranes; rails; bustards
order guttiferalesnused in some classifications; coextensive with Parietales
order gymnophionanan order of amphibians including caecilians
order haemosporidianan order in the subclass Telosporidia
order haplosporidianan order in the subclass Acnidosporidia
order heliozoanmostly freshwater protozoa
order helotialesnorder of fungi having asci in a disk-shaped to goblet-shaped apothecium
order hemipteranplant bugs; bedbugs; some true bugs; also includes suborders Heteroptera (true bugs) and Homoptera (e.g., aphids, plant lice and cicadas)
order heterosomatanflatfishes: halibut; sole; flounder; plaice; turbot; tonguefishes
order heterotrichalesnyellow-green algae with simple or branching filaments; comprising the single family Tribonemaceae
order hymenogastralesnan order of fungi belonging to the class Gasteromycetes; has a distinct basidiocarp with a fleshy or waxy gleba (sometimes placed in subclass Homobasidiomycetes)
order hymenopteranan order of insects including: bees; wasps; ants; ichneumons; sawflies; gall wasps; etc.
order hypericalesna large order of dicotyledonous plants of subclass Dilleniidae
order hypermastiginancellulose-producing flagellates
order hypocrealesnused in some classifications for the family Hypocreaceae
order hyracoideanhyraxes and some extinct animals
order ichthyosaurianextinct marine reptiles: ichthyosaurs
order ictodosaurianextinct reptiles of the later Triassic period
order insectivoranshrews; moles; hedgehogs; tenrecs
order insessoresna bird with feet adapted for perching (as on tree branches); this order is now generally abandoned by taxonomists
order isoetalesnaquatic or marsh-growing fern allies; known to have existed since the Cenozoic; sometimes included in Lycopodiales
order isopodanwoodlice
order isopteranorder of social insects that live in colonies, including: termites; often placed in subclass Exopterygota
order isospondylinmost primitive teleost fishes; all are soft-finned: salmon; trout; herring; shad; sardines; anchovies; whitefish; smelts; tarpon
order juglandalesncoextensive with the family Juglandaceae
order jungermannialesnlarge order of chiefly tropical liverworts
order lagomorphanrabbits; hares; pikas; formerly considered the suborder Duplicidentata of the order Rodentia
order laminarialesnin some classifications coextensive with family Laminariaceae: marine brown algae of cold or polar seas
order lechanoralesncategory used in some classification systems for all lichens that produce apothecia
order lepidodendralesnfossil arborescent plants arising during the early Devonian and conspicuous throughout the Carboniferous
order lepidopteranmoths and butterflies
order lichenalesncategory used especially in former classifications for organisms now constituting the division Lichenes
order lilialesnan order of monocotyledonous plants including Amaryllidaceae and Liliaceae and Iridaceae
order lobatanctenophore having tentacles only in the immature stage; body compressed vertically having two large oral lobes and four pointed processes
order loricatanformer name for the order Crocodylia
order lycoperdalesnsmall order of basidiomycetous fungi having fleshy often globose fruiting bodies; includes puffballs and earthstars
order lycopodialesnlower vascular plants coextensive with the family Lycopodiaceae; in some classifications includes the Selaginellaceae and Isoetaceae
order lyginopteridalesnfossil gymnospermous trees or climbing plants from the Devonian: seed ferns
order madreporarianstony corals
order mallophaganbiting lice
order malvalesnMalvaceae; Bombacaceae; Elaeocarpaceae; Sterculiaceae; Tiliaceae
order mantophasmatodeanan order of insect identified in 2002 in a 45 million year old piece of amber from the Baltic region
order marattialesnlower ferns coextensive with the family Marattiaceae
order marchantialesnliverworts with gametophyte differentiated internally
order marsupialiancoextensive with the subclass Metatheria
order mecopteranan order of carnivorous insects usually having long membranous wings and long beaklike heads with chewing mouths at the tip
order monilialesnorder of imperfect fungi lacking conidiophores of having conidiophores that are superficial and not enclosed in a pycnidium
order monotrematancoextensive with the subclass Prototheria
order mucoralesnan order of mostly saprophytic fungi
order musalesntropical plants
order myaceaenclams
order mycelia sterilianorder of imperfect fungi having no known spore stage
order mycoplasmatalesncoextensive with the family Mycoplasmataceae
order mycrosporidianan order in the subclass Cnidosporidia
order myricalesncoextensive with the family Myricaceae
order myrtalesnMyrtaceae; Combretaceae; Elaeagnaceae; Haloragidaceae; Melastomaceae; Lecythidaceae; Lythraceae; Rhizophoraceae; Onagraceae; Lecythidaceae; Punicaceae
order mysidaceanopossum shrimp
order myxobacteralesnan order of higher bacteria
order myxobacterianan order of higher bacteria
order myxobacterialesnan order of higher bacteria
order myxosporidianan order in the subclass Cnidosporidia
order naiadalesnan order of aquatic monocotyledonous herbaceous plants
order neuropteranan order of insects including: lacewings; antlions; dobsonflies; alderflies; fish flies; mantispids; spongeflies
order nidularialesnsmall order of basidiomycetous fungi comprising families Nidulariaceae and Sphaerobolaceae
order notostracansmall freshwater crustaceans with a shield-shaped carapace
order nudibranchiancomprising numerous marine gastropod mollusks lacking a shell in the adult state and usually having a body like a slug
order octopodanoctopuses and paper nautilus
order odonatandragonflies and damselflies
order oedogonialesnsimple or branched filamentous freshwater green algae
order of businessna list of matters to be taken up (as at a meeting)
order of magnitudena degree in a continuum of size or quantity
order of magnitudena number assigned to the ratio of two quantities; two quantities are of the same order of magnitude if one is less than 10 times as large as the other; the number of magnitudes that the quantities differ is specified to within a power of 10
order of our lady of mount carmelna Roman Catholic mendicant order founded in the 12th century
order of paymentna document ordering the payment of money; drawn by one person or bank on another
order of saint benedictna Roman Catholic monastic order founded in the 6th century; noted for liturgical worship and for scholarly activities
order of the daynthe order of business for an assembly on a given day
order of the purple heartna United States military decoration awarded to any member of the armed forces who is wounded in action
order olealesncoextensive with the family Oleaceae; in some classifications included in the order Gentianales
order ophioglossalesncoextensive with the family Ophioglossaceae
order opilionesnharvestmen
order opuntialesncoextensive with the family Cactaceae: cactuses
order orchidalesnorder of plants with irregular flowers having minute seeds: Orchidaceae; Burmanniaceae
order ornithischianextinct terrestrial reptiles having birdlike pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)
order orthopterangrasshoppers and locusts; crickets
order ostariophysinin some classifications considered a superorder comprising the Cypriniformes and the Siluriformes
order ostracoderminextinct group of armored jawless vertebrates; taxonomy is not clear
order palmalesncoextensive with the family Palmae: palms
order pandanalesnfamilies Typhaceae; Sparganiaceae; Pandanaceae
order papaveralesnan order of dicotyledonous plants
order paperna printed copy of the order of the day
order parietalesna large order of dicotyledonous plants of subclass Dilleniidae
order passeriformesnlargest order of birds comprising about half the known species; rooks; finches; sparrows; tits; warblers; robins; wrens; swallows; etc.; the four suborders are Eurylaimi and Tyranni and Menurae and Oscines or Passeres
order pectinibranchianlarge order of gastropods comprising univalve mollusks that have a single gill resembling a comb
order pediculatinanglers and batfishes; spiny-finned marine fishes having pectoral fins at the ends of armlike processes and a long movable spine on the dorsal fin to lure prey to the large mouth
order pedipalpinwhip scorpions
order pelecaniformesnpelicans; frigate birds; gannets; cormorants
order pelycosaurianedaphosaurus; dimetrodon
order perciformesnone of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
order percomorphinone of the largest natural groups of fishes of both marine and fresh water: true perches; basses; tuna
order perissodactylannonruminant ungulates: horses; tapirs; rhinoceros; extinct forms
order peronosporalesnorder of chiefly parasitic lower fungi: Albuginaceae and Peronosporaceae and Pythiaceae
order pezizalesnorder of mostly saprophytic fungi having cup-shaped ascocarps
order phalangidanharvestmen
order phallalesnorder of fungi comprising the stinkhorns and related forms whose mature hymenium is slimy and fetid; sometimes placed in subclass Homobasidiomycetes
order phasmatodeanin some classifications considered a suborder of Orthoptera: stick insects; leaf insects
order phasmidanin some classifications considered a suborder of Orthoptera: stick insects; leaf insects
order pholidotanpangolins; in some former classifications included in the order Edentata
order picariaenterm used in some classifications as nearly equivalent to the order Coraciiformes
order piciformesnwoodpeckers; jacamars; puffbirds; barbets; honey guides; toucans
order piperalesnPiperaceae; Saururaceae; Chloranthaceae
order plantaginalesncoextensive with the family Plantaginaceae
order platycteneanan order of Tentaculata
order plecopteranstoneflies
order plectognathinboxfishes; filefishes; globefishes; ocean sunfishes; triggerfishes; puffers
order pleuronectiformesnflatfishes: halibut; sole; flounder; plaice; turbot; tonguefishes
order plumbaginalesncoextensive with the family Plumbaginaceae; usually included in order Primulales
order podicipediformesngrebes
order podicipitiformesngrebes
order polemonialesnPolemoniaceae; Solanaceae; Boraginaceae; Labiatae; Lentibulariaceae; Pedaliaceae; in some classifications includes the order Scrophulariales
order polygonalesncoextensive with the family Polygonaceae,
order polymastiginansmall usually parasitic flagellates
order polypodialesntrue (leptosporangiate) ferns
order primatesnan animal order including lemurs and tarsiers and monkeys and apes and human beings
order primulalesnPrimulaceae; Theophrastaceae; Myrsinaceae; and (in some classifications) Plumbaginaceae
order proboscideanan order of animals including elephants and mammoths
order procellariiformesnpetrels; albatrosses; shearwaters; diving petrels
order protealesncoextensive with the family Proteaceae
order proturanminute wingless arthropods: telsontails
order pseudomonadalesnone of two usually recognized orders of true bacteria; Gram-negative spiral or spherical or rod-shaped bacteria usually motile by polar flagella; some contain photosynthetic pigments
order pseudoscorpionesnfalse scorpions
order pseudoscorpionidanfalse scorpions
order psilophytalesnPaleozoic simple dichotomously branched plants of Europe and eastern Canada including the oldest known vascular land plants
order psilotalesnlower vascular plants having dichotomously branched sporophyte divided into aerial shoot and rhizome and lacking true roots
order psittaciformesnan order of birds including parrots and amazons and cockatoos and lorikeets and lories and macaws and parakeets
order psocopteranan order of insects: includes booklice and bark-lice
order pterosaurianextinct flying reptiles: pterosaurs
order pulmonatanlarge order of gastropods usually breathing by means of a lung-like sac comprising most land snails and slugs and many freshwater snails
order pycnogonidansea spiders
order radiolarianmarine protozoa
order rajiformesnfish with dorsoventrally flattened bodies; includes: rays; skates; guitarfishes; sawfishes
order ranalesnherbs, shrubs and trees: includes families Ranunculaceae; Annonaceae; Berberidaceae; Magnoliaceae; Menispermaceae; Myristicaceae; Nymphaeaceae; Lardizabalaceae; Lauraceae; Calycanthaceae; Ceratophyllaceae; Cercidiphyllaceae
order ranunculalesnherbs, shrubs and trees: includes families Ranunculaceae; Annonaceae; Berberidaceae; Magnoliaceae; Menispermaceae; Myristicaceae; Nymphaeaceae; Lardizabalaceae; Lauraceae; Calycanthaceae; Ceratophyllaceae; Cercidiphyllaceae
order raptoresnterm used in former classifications; erroneously grouped together birds of the orders Falconiformes and Strigiformes
order rhamnalesnan order of dicotyledonous plants
order rheiformesna ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheas
order rhoeadalesnan order of dicotyledonous plants
order rhynchocephaliantuataras; extinct forms from middle Triassic
order rickettsialesnpleomorphic Gram-negative microorganisms
order rodentiansmall gnawing animals: porcupines; rats; mice; squirrels; marmots; beavers; gophers; voles; hamsters; guinea pigs; agoutis
order rosalesnin some classifications this category does not include Leguminosae
order rubialesnan order of dicotyledonous plants of the subclass Asteridae; have opposite leaves and an inferior compound ovary
order salicalesncoextensive with the family Salicaceae
order salientianfrogs, toads, tree toads
order santalalesnorder of plants distinguished by having a one-celled inferior ovary; many are parasitic or partly parasitic usually on roots
order sapindalesnan order of dicotyledonous plants
order saprolegnialesnorder of chiefly aquatic fungi
order sarcosporidianimperfectly known parasites of the muscles of vertebrates
order sarracenialesnplants that are variously modified to serve as insect traps: families Sarraceniaceae; Nepenthaceae; Droseraceae
order saurischianextinct terrestrial reptiles: theropods (carnivorous); sauropods (herbivorous)
order sauropterygianextinct marine reptiles: plesiosaurs; nothosaurs
order scandentiana small order comprising only the tree shrews: in some classifications tree shrews are considered either primates (and included in the suborder Prosimii) or true insectivores (and included in the order Insectivora)
order sclerodermatalesnan order of fungi having a peridium surrounding a gleba (sometimes placed in subclass Homobasidiomycetes)
order scleropareinscorpionfishes; sculpins; gurnards; greenlings; flying gurnards
order scorpionidantrue scorpions
order scrophularialesnused in some classification systems; often included in the order Polemoniales
order secotialesnan order of fungi belonging to the class Gasteromycetes
order selaginellalesnin some classifications included in Lycopodiales
order siluriformesnan order of fish belonging to the superorder Malacopterygii including catfishes
order siphonapteranfleas
order siphonophoranmarine colonial hydrozoans
order sirenianan animal order including: manatees; dugongs; Steller's sea cow
order solenichthyesnbellows fishes; shrimpfishes; cornetfishes; pipefishes; small order of chiefly tropical marine fishes of varied and bizarre form all having a small mouth at the end of a drawn-out tubular snout
order solenogastresnan order of Amphineura
order spatangoidanheart-shaped sea urchins
order sphaerialesnlarge order of ascomycetous fungi usually having a dark hard perithecia with definite ostioles; in more recent classifications often divided among several orders
order sphaerocarpalesnsmall order sometimes included in the order Jungermanniales
order sphagnalesncoextensive with the genus Sphagnum; in some classifications isolated in a separate subclass
order sphenisciformesnpenguins
order spirochaetalesnhigher bacteria; slender spiral rodlike forms
order squamatandiapsid reptiles: snakes and lizards
order stegocephalianin former classifications a division of class Amphibia comprising all pre-Jurassic and some later extinct large salamandriform amphibia
order stereospondylinformerly a suborder of Stegocephalia; amphibia having vertebrae whose component elements are fused into a single piece
order stomatopodanmantis shrimps
order strigiformesnowls
order struthioniformesna ratite bird order: ostriches and related extinct birds; known from the Pleistocene onward
order synentognathinorder of fishes having spineless fins; needlefishes; sauries; flying fishes; halfbeaks
order taxalesncoextensive with the family Taxaceae: yews
order temnospondylinformerly a suborder of Stegocephalia; large Carboniferous and Permian amphibians having vertebrae in which some elements remain separate
order testaceantestacean rhizopods
order testudinatantortoises and turtles
order testudinesntortoises and turtles
order tetraodontiformesnboxfishes; filefishes; globefishes; ocean sunfishes; triggerfishes; puffers
order thecodontianextinct terrestrial reptiles having teeth set in sockets; of the late Permian to Triassic
order therapsidanextinct mammal-like reptiles found inhabiting all continents from the mid Permian to late Triassic
order thymelaealesnMyrtaceae; Combretaceae; Elaeagnaceae; Haloragidaceae; Melastomaceae; Lecythidaceae; Lythraceae; Rhizophoraceae; Onagraceae; Lecythidaceae; Punicaceae
order thysanopteranthrips
order thysanuranfirebrats; silverfish; machilids
order tinamiformesncoextensive with the family Tinamidae
order torpediniformesnrays with bodies shaped like torpedoes
order tremellalesnfungi varying from gelatinous to waxy or even horny in texture; most are saprophytic
order trichopteranan order of insects consisting of caddis flies
order trogoniformesntrogons
order tuberalesnsmall order of fungi belonging to the subdivision Ascomycota having closed underground ascocarps
order tubulidentatanan order of Eutheria
order tulostomatalesnan order of fungi belonging to the class Gasteromycetes
order ulvalesnan order of protoctist
order umbellalesnplants having umbels or corymbs of uniovulate flowers; includes the Umbelliferae (chiefly herbs) and Cornaceae (chiefly trees or shrubs)
order uredinalesnrust fungi: parasitic fungi causing rust in plants; sometimes placed in
order urodellansalamanders; newts; congo snakes
order uropyginwhip scorpions
order urticalesnan order of dicotyledonous plants including Moraceae and Urticaceae and Ulmaceae
order ustilaginalesnparasitic fungi causing smuts; sometimes placed in class Tiliomycetes
order volvocalesnchiefly freshwater green algae; solitary or colonial
order xiphosuranhorseshoe crabs and extinct forms
order xyridalesnan order of monocotyledonous herbs
order zeomorphindories
order zygnemalesnpond scums; desmids
order zygnematalesnpond scums; desmids
order-chenopodialesncorresponds approximately to the older group Centrospermae
orderedamarked by an orderly, logical, and aesthetically consistent relation of parts
orderedahaving a systematic arrangement; especially having elements succeeding in order according to rule
orderedadisposed or placed in a particular kind of order
orderedsmarked by system or regularity or discipline
ordered seriesnan ordered reference standard
orderernan organizer who puts things in order
orderernsomeone who places an order to buy
orderingnthe act of putting things in a sequential arrangement
orderingnlogical or comprehensible arrangement of separate elements
orderlinessnthe quality of appreciating method and system
orderlinessna condition of regular or proper arrangement
orderlyamarked by an orderly, logical, and aesthetically consistent relation of parts
orderlyadevoid of violence or disruption
orderlyna male hospital attendant who has general duties that do not involve the medical treatment of patients
orderlyna soldier who serves as an attendant to a superior officer
orderlysmarked by system or regularity or discipline
orderlysnot haphazard
orderlysaccording to custom or rule or natural law
orderlysmarked by or adhering to method or system
orderly sergeantnthe first sergeant of a company; duties formerly included the conveyance of orders
ordinalabeing or denoting a numerical order in a series
ordinalaof or relating to a taxonomic order
ordinalnthe number designating place in an ordered sequence
ordinal numbernthe number designating place in an ordered sequence
ordinancenthe act of ordaining; the act of conferring (or receiving) holy orders
ordinancena statute enacted by a city government
ordinancenan authoritative rule
ordinandna person being ordained
ordinarilyrunder normal conditions
ordinarinessnthe quality of being commonplace and ordinary
ordinaryanot exceptional in any way especially in quality or ability or size or degree
ordinaryn(heraldry) any of several conventional figures used on shields
ordinarynan early bicycle with a very large front wheel and small back wheel
ordinaryna judge of a probate court
ordinaryna clergyman appointed to prepare condemned prisoners for death
ordinarynthe expected or commonplace condition or situation
ordinaryslacking special distinction, rank, or status; commonly encountered
ordinary annuitynan annuity paid in a series of more or less equal payments at the end of equally spaced periods
ordinary bicyclenan early bicycle with a very large front wheel and small back wheel
ordinary carenthe care that a reasonable man would exercise under the circumstances; the standard for determining legal duty
ordinary life insuranceninsurance on the life of the insured for a fixed amount at a definite premium that is paid each year in the same amount during the entire lifetime of the insured
ordinary sharesnstock other than preferred stock; entitles the owner to a share of the corporation's profits and a share of the voting power in shareholder elections
ordinatenthe value of a coordinate on the vertical axis
ordinatevbring (components or parts) into proper or desirable coordination correlation
ordinatevappoint to a clerical posts
ordinationnthe act of ordaining; the act of conferring (or receiving) holy orders
ordinationnlogical or comprehensible arrangement of separate elements
ordinationnthe status of being ordained to a sacred office
ordnancenlarge but transportable armament
ordnancenmilitary supplies
ordnance storenmilitary supplies
ordnance surveynthe official cartography agency of the British government
ordoviciannfrom 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
ordovician periodnfrom 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
ordurensolid excretory product evacuated from the bowels
orena monetary subunit in Denmark and Norway and Sweden; 100 ore equal 1 krona
orena mineral that contains metal that is valuable enough to be mined
ore bedna stratum of ore
ore dressingncrushing and separating ore into valuable substances or waste by any of a variety of techniques
ore processingncrushing and separating ore into valuable substances or waste by any of a variety of techniques
oreadn(Greek mythology) one of the mountain nymphs
oreamnosnmountain goats
oreamnos americanusnsure-footed mammal of mountainous northwestern North America
orectolobidaennurse sharks and carpet sharks
orectolobusncarpet sharks
orectolobus barbatusnshark of the western Pacific with flattened body and mottled skin
oreganonpungent leaves used as seasoning with meats and fowl and in stews and soups and omelets
oreganonaromatic Eurasian perennial
oregonna state in northwestern United States on the Pacific
oregon aldernlarge tree of Pacific coast of North America having hard red wood much used for furniture
oregon ashntimber tree of western North America yielding hard light wood; closely related to the red ash
oregon cedarnlarge timber tree of western North America with trunk diameter to 12 feet and height to 200 feet
oregon crab applensmall tree or shrub of western United States having white blossoms and tiny yellow or red fruit
oregon firnlofty douglas fir of northwestern North America having short needles and egg-shaped cones
oregon grapenornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries
oregon grapensmall shrub with grey-green leaves and yellow flowers followed by glaucous blue berries
oregon holly grapenornamental evergreen shrub of Pacific coast of North America having dark green pinnate leaves and racemes of yellow flowers followed by blue-black berries
oregon jargonna pidgin incorporating Chinook and French and English words; formerly used as a lingua franca in northwestern North America
oregon larchntall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree
oregon lilynlily of western North America with showy orange-red purple-spotted flowers
oregon maplenmaple of western North America having large 5-lobed leaves orange in autumn
oregon myrtlenPacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood
oregon oaknsmall deciduous tree of western North America with crooked branches and pale grey bark
oregon pinenlofty douglas fir of northwestern North America having short needles and egg-shaped cones
oregon white oaknsmall deciduous tree of western North America with crooked branches and pale grey bark
oregonianna native or resident of Oregon
oreidenalloy of copper and tin and zinc; used in imitation gold jewelry
orelanismnthe political philosophy of the Orleanists
oreonchocolate cookie with white cream filling
oreo cookienchocolate cookie with white cream filling
oreopterisn3 species of ferns formerly included in genus Dryopteris or Thelypteris
oreopteris limbospermancommon European mountain fern having fragrant lemon or balsam scented fronds
oreortyxnmountain quail of western United States
oreortyx picta palmerinCalifornia partridge; slightly larger than the California quail
orestesn(Greek mythology) the son of Agamemnon and Clytemnestra; his sister Electra persuaded him to avenge Agamemnon's death by killing Clytemnestra and Aegisthus
orffnGerman musician who developed a widely used system for teaching music to children (1895-1982)
organn(music) an electronic simulation of a pipe organ
organna free-reed instrument in which air is forced through the reeds by bellows
organnwind instrument whose sound is produced by means of pipes arranged in sets supplied with air from a bellows and controlled from a large complex musical keyboard
organna fully differentiated structural and functional unit in an animal that is specialized for some particular function
organna periodical that is published by a special interest group
organna government agency or instrument devoted to the performance of some specific function
organ donornsomeone from whom an organ is taken for transplantation
organ loftna gallery occupied by a church organ
organ of cortinthe hearing organ of the inner ear; contains receptors that respond to sound waves
organ of hearingnthe part of the ear that is responsible for sensations of sound
organ of speechnany of the organs involved in speech production
organ pipenthe flues and stops on a pipe organ
organ stopna graduated set of organ pipes of like tone quality
organ transplantnan operation moving an organ from one organism (the donor) to another (the recipient)
organdiena sheer stiff muslin
organdyna sheer stiff muslin
organellena specialized part of a cell; analogous to an organ
organ-grinderna street musician who plays a hand organ or hurdy-gurdy
organicainvolving or affecting physiology or bodily organs
organicarelating or belonging to the class of chemical compounds having a carbon basis
organicabeing or relating to or derived from or having properties characteristic of living organisms
organicaof or relating to or derived from living organisms
organicna fertilizer that is derived from animal or vegetable matter
organicsconstitutional in the structure of something (especially your physical makeup)
organicssimple and healthful and close to nature
organicsof or relating to foodstuff grown or raised without synthetic fertilizers or pesticides or hormones
organic brain syndromenmental abnormality resulting from disturbance of the structure or function of the brain
organic chemistrynthe chemistry of compounds containing carbon (originally defined as the chemistry of substances produced by living organisms but now extended to substances synthesized artificially)
organic compoundnany compound of carbon and another element or a radical
organic disorderndisorder caused by a detectable physiological or structural change in an organ
organic evolutionn(biology) the sequence of events involved in the evolutionary development of a species or taxonomic group of organisms
organic fertiliserna fertilizer that is derived from animal or vegetable matter
organic fertilizerna fertilizer that is derived from animal or vegetable matter
organic lawnlaw determining the fundamental political principles of a government
organic light-emitting diodena self-luminous diode (it glows when an electrical field is applied to the electrodes) that does not require backlighting or diffusers
organic phenomenonn(biology) a natural phenomenon involving living plants and animals
organic processna process occurring in living organisms
organic structurenthe entire structure of an organism (especially an animal or human being)
organicallyrinvolving carbon compounds
organicallyras an important constituent
organicallyrin an organic manner
organicismntheory that the total organization of an organism rather than the functioning of individual organs is the determinant of life processes
organicisticarelating to or tending toward organicism
organificationnthe process of organ formation
organisationnthe act of forming something
organisationnthe activity or result of distributing or disposing persons or things properly or methodically
organisationnthe act of organizing a business or an activity related to a business
organisationnan ordered manner; orderliness by virtue of being methodical and well organized
organisationnan organized structure for arranging or classifying
organisationna group of people who work together
organisationnthe persons (or committees or departments etc.) who make up a body for the purpose of administering something
organisationalaof or relating to an organization
organisevbring order and organization to
organisevplan and direct (a complex undertaking)
organisevarrange by systematic planning and united effort
organisevcause to be structured or ordered or operating according to some principle or idea
organisevform or join a union
organisevcreate (as an entity)
organisedsbeing a member of or formed into a labor union
organiserna lightweight consumer electronic device that looks like a hand-held computer but instead performs specific tasks; can serve as a diary or a personal database or a telephone or an alarm clock etc.
organiserna person who brings order and organization to an enterprise
organisernsomeone who enlists workers to join a union
organismna living thing that has (or can develop) the ability to act or function independently
organismna system considered analogous in structure or function to a living body
organismalaof or relating to or belonging to an organism (considered as a whole)
organismicaof or relating to or belonging to an organism (considered as a whole)
organistna person who plays an organ
organizationnthe act of forming something
organizationnthe activity or result of distributing or disposing persons or things properly or methodically
organizationnthe act of organizing a business or an activity related to a business
organizationnan ordered manner; orderliness by virtue of being methodical and well organized
organizationnan organized structure for arranging or classifying
organizationna group of people who work together
organizationnthe persons (or committees or departments etc.) who make up a body for the purpose of administering something
organization chartna chart showing the lines of responsibility between departments of a large organization
organization expensenthe cost (over a period of five years) of organizing a new corporation or partnership
organization for the prohibition of chemical weaponsninternational organization for chemical disarmament; administers the Chemical Weapons Convention
organization mannan employee who sacrifices his own individuality for the good of an organization
organization of american statesnan association of countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation
organization of petroleum-exporting countriesnan organization of countries formed in 1961 to agree on a common policy for the production and sale of petroleum
organization of the oppressed on earthna Shiite terrorist organization with strong ties to Iran; seeks to create an Iranian fundamentalist Islamic state in Lebanon; car bombs are the signature weapon
organizationalaof or relating to an organization
organizationallyrwith regard to organization
organizevbring order and organization to
organizevplan and direct (a complex undertaking)
organizevarrange by systematic planning and united effort
organizevcause to be structured or ordered or operating according to some principle or idea
organizevform or join a union
organizevcreate (as an entity)
organizedamethodical and efficient in arrangement or function
organizedaformed into a structured or coherent whole
organizedsbeing a member of or formed into a labor union
organized crimenunderworld organizations
organized labornemployees who are represented by a labor union
organized religionnan institution to express belief in a divine power
organizerna lightweight consumer electronic device that looks like a hand-held computer but instead performs specific tasks; can serve as a diary or a personal database or a telephone or an alarm clock etc.
organizerna person who brings order and organization to an enterprise
organizernsomeone who enlists workers to join a union
organonna system of principles for philosophic or scientific investigations; an instrument for acquiring knowledge
organophosphatenan insecticide that interferes with an insect's nervous system
organophosphate nerve agentnany of a series of nerve agents containing organophosphate compounds first synthesized by German chemists in 1936; in World War II the Germans tested them in concentration camps but not on the battlefield; Iraq is alleged to have used them against Iran and against the Kurds
organsnedible viscera of a butchered animal
organzana fabric made of silk or a silklike fabric that resembles organdy
orgasmnthe moment of most intense pleasure in sexual intercourse
orgiasticsused of riotously drunken merrymaking
orgiasticsused of frenzied sexual activity
orgyna wild gathering involving excessive drinking and promiscuity
orgynsecret rite in the cults of ancient Greek or Roman deities involving singing and dancing and drinking and sexual activity
orgynany act of immoderate indulgence
orielna projecting bay window corbeled or cantilevered out from a wall
oriel windowna projecting bay window corbeled or cantilevered out from a wall
orientnthe hemisphere that includes Eurasia and Africa and Australia
orientnthe countries of Asia
orients(poetic) eastern
orientvdetermine one's position with reference to another point
orientvcause to point
orientvbe oriented
orientalna member of an Oriental race; the term is regarded as offensive by Asians (especially by Asian Americans)
orientalsdenoting or characteristic of the biogeographic region including southern Asia and the Malay Archipelago as far as the Philippines and Borneo and Java
oriental alabasterna hard compact kind of calcite
oriental arborvitaenAsiatic shrub or small tree widely planted in United States and Europe; in some classifications assigned to its own genus
oriental beetlenintroduced into United States from the Orient; larvae feed on roots of sugarcane and other grasses
oriental bittersweetnornamental Asiatic vine with showy orange-yellow fruit with a scarlet aril; naturalized in North America
oriental black mushroomnedible east Asian mushroom having a golden or dark brown to blackish cap and an inedible stipe
oriental bush cherrynwoody oriental plant with smooth unfurrowed red fruit grown especially for its white or pale pink blossoms
oriental cherrynornamental tree with inedible fruits widely cultivated in many varieties for its white blossoms
oriental cockroachndark brown cockroach originally from orient now nearly cosmopolitan in distribution
oriental garlicna plant of eastern Asia; larger than Allium schoenoprasum
oriental personna member of an Oriental race; the term is regarded as offensive by Asians (especially by Asian Americans)
oriental planenlarge tree of southeastern Europe to Asia Minor
oriental poppyncommonly cultivated Asiatic perennial poppy having stiff heavily haired leaves and bright scarlet or pink to orange flowers
oriental roachndark brown cockroach originally from orient now nearly cosmopolitan in distribution
oriental scops owlnAsian scops owl
oriental sorenleishmaniasis of the skin; characterized by ulcerative skin lesions
oriental sprucenevergreen tree of the Caucasus and Asia Minor used as an ornamental having pendulous branchlets
oriental studiesnthe scholarly knowledge of Asian cultures and languages and people
orientalisevmake oriental in character
orientalismnthe quality or customs or mannerisms characteristic of Asian civilizations
orientalismnthe scholarly knowledge of Asian cultures and languages and people
orientalistna specialist in oriental subjects
orientalizevmake oriental in character
orientatevdetermine one's position with reference to another point
orientatedaadjusted or located in relation to surroundings or circumstances; sometimes used in combination
orientatingapositioning with respect to a reference system or determining your bearings physically or intellectually
orientationna course introducing a new situation or environment
orientationnthe act of orienting
orientationna person's awareness of self with regard to position and time and place and personal relationships
orientationna predisposition in favor of something
orientationnan integrated set of attitudes and beliefs
orientationnposition or alignment relative to points of the compass or other specific directions
orientation coursena course introducing a new situation or environment
orientedaadjusted or located in relation to surroundings or circumstances; sometimes used in combination
orientingapositioning with respect to a reference system or determining your bearings physically or intellectually
orificenan aperture or hole that opens into a bodily cavity
oriflammena red or orange-red flag used as a standard by early French kings
oriflammenan inspiring symbol or ideal that serves as a rallying point in a struggle
origaminthe Japanese art of folding paper into shapes representing objects (e.g., flowers or birds)
origanumnany of various fragrant aromatic herbs of the genus Origanum used as seasonings
origanum dictamnusndwarf aromatic shrub of Crete
origanum majorananaromatic European plant native to Mediterranean and Turkey; not widespread in Europe
origanum vulgarenaromatic Eurasian perennial
origennGreek philosopher and theologian who reinterpreted Christian doctrine through the philosophy of Neoplatonism; his work was later condemned as unorthodox (185-254)
originnproperties attributable to your ancestry
originnthe point of intersection of coordinate axes; where the values of the coordinates are all zero
originnan event that is a beginning; a first part or stage of subsequent events
originnthe descendants of one individual
originnthe place where something begins, where it springs into being
originalabeing or productive of something fresh and unusual; or being as first made or thought of
originalnan original creation (i.e., an audio recording) from which copies can be made
originalnan original model on which something is patterned
originalsnot derived or copied or translated from something else
originalspreceding all others in time or being as first made or performed
originals(of e.g. information) not secondhand or by way of something intermediary
original sinna sin said to be inherited by all descendants of Adam
originalismnthe belief that the United States Constitution should be interpreted in the way the authors originally intended it
originalitynthe quality of being new and original (not derived from something else)
originalitynthe ability to think and act independently
originallyrin an original manner
originallyrbefore now
originallyrwith reference to the origin or beginning
originatevbring into being
originatevcome into existence; take on form or shape
originatevbegin a trip at a certain point, as of a plane, train, bus, etc.
originate invcome from
originationnthe act of starting something for the first time; introducing something new
originationnan event that is a beginning; a first part or stage of subsequent events
origination feena fee charged to a borrower (especially for a mortgage loan) to cover the costs of initiating the loan
originativeahaving the ability or power to create
originativescontaining seeds of later development
originatornsomeone who creates new things
orinasalna speech sound produced with both the oral and nasal passages open (as French nasal vowels)
orinasal phonena speech sound produced with both the oral and nasal passages open (as French nasal vowels)
orinasensulfonylurea; an oral antidiabetic drug (trade name Orinase) used in the treatment of adult-onset diabetes mellitus
orinocona South American river 1,500 miles long; flows into the South Atlantic
orinoco riverna South American river 1,500 miles long; flows into the South Atlantic
oriolenAmerican songbird; male is black and orange or yellow
oriolenmostly tropical songbird; the male is usually bright orange and black
oriolidaenOld World orioles
oriolusntype genus of the Oriolidae
oriolus oriolusnbright yellow songbird with black wings
orionna constellation on the equator east of Taurus; contains Betelgeuse and Rigel
orionn(Greek mythology) a giant Boeotian hunter who pursued the Pleiades and was eventually slain by Artemis; was then placed in the sky as a constellation
orisonnreverent petition to a deity
orissanstate in eastern India on the Bay of Bengal
oritesnsmall genus of Australian shrubs or trees
orites excelsanAustralian tree having alternate simple leaves (when young they are pinnate with prickly toothed margins) and slender axillary spikes of white flowers
oriyana Magadhan language that is spoken by the Oriya and is the official language of the Indian state of Orissa
oriyana member of a people in India living in Orissa and neighboring areas
orizabana city of east central Mexico (west of Veracruz); a popular resort
orkney islandsnan archipelago of about 70 islands in the North Atlantic and North Sea off the northeastern coast of Scotland
orlandona city in central Florida; site of Walt Disney World
orlando di lassonBelgian composer (1532-1594)
orleanaisna former province of north central France; centered around Orleans
orleanismnthe political principles of the Orleanists
orleanistna supporter of the Orleans branch of the Bourbons that was descended from a younger brother of Louis XIV
orleansna long siege by the English was relieved by Joan of Arc in 1429
orleansna city on the Loire river in north central France; site of the siege of Orleans by the English (1428-1429)
orlonnan acrylic fiber or the lightweight crease-resistant fabric made with Orlon yarns
orlopnthe fourth or lowest deck
orlop decknthe fourth or lowest deck
orlyna southeastern suburb of Paris; site of an international airport serving Paris
orly groupna militant Marxist-Leninist terrorist organization formed in 1975 to force Turkey to acknowledge killing more than a million Armenians and forcibly removing them from border areas in 1915; wants Turkey to pay reparations and cede territory to Armenia
ormandynUnited States conductor (born in Hungary) (1899-1985)
ormazdnchief deity of Zoroastrianism; source of light and embodiment of good
ormernan abalone found near the Channel Islands
ormolunbrass that looks like gold; used to decorate furniture
ormosiangenus of tropical shrubs and trees having usually odd-pinnate leaves with large leaflets and pink to reddish wood
ormosia coarctatanWest Indian tree similar to Ormosia monosperma but larger and having smaller leaflets and smaller seeds
ormosia monospermansmall tree of West Indies and northeastern Venezuela having large oblong pointed leaflets and panicles of purple flowers; seeds are black or scarlet with black spots
ormuzdnchief deity of Zoroastrianism; source of light and embodiment of good
ornamentnsomething used to beautify
ornamentvmake more attractive by adding ornament, colour, etc.
ornamentvbe an ornament to
ornamentalnany plant grown for its beauty or ornamental value
ornamentalsserving an esthetic rather than a useful purpose
ornamentalismnthe practice of ornamental display
ornamentalistnsomeone who decorates
ornamentallyrin an ornamental, nonfunctional manner
ornamentationnthe act of adding extraneous decorations to something
ornamentationnsomething used to beautify
ornamentationnthe state of being ornamented
ornamentedsrich in decorative detail
ornatesrich in decorative detail
ornatesmarked by elaborate rhetoric and elaborated with decorative details
ornatelyrin an ornate manner
ornatenessnan ornate appearance; being elaborately (even excessively) decorated
ornatenessnhigh-flown style; excessive use of verbal ornamentation
ornerinessnmeanspirited disagreeable contrariness
orneryshaving a difficult and contrary disposition
ornithinenan amino acid that does not occur in proteins but is important in the formation of urea
ornithischianextinct terrestrial reptiles having birdlike pelvises: armored dinosaurs (thyreophorans); boneheaded and horned dinosaurs (marginocephalians); duck-billed dinosaurs (euronithopods)
ornithischiannherbivorous dinosaur with a pelvis like that of a bird
ornithischian dinosaurnherbivorous dinosaur with a pelvis like that of a bird
ornithogalumnsometimes placed in family Hyacinthaceae
ornithogalum pyrenaicumnOld World star of Bethlehem having edible young shoots
ornithogalum thyrsoidesnSouth African perennial with long-lasting spikes of white blossoms that are shipped in to Europe and America for use as winter cut flowers
ornithogalum umbellatumncommon Old World herb having grasslike leaves and clusters of star-shaped white flowers with green stripes; naturalized in the eastern United States
ornithologicalaof or relating to ornithology
ornithologistna zoologist who studies birds
ornithologynthe branch of zoology that studies birds
ornithomimidnlightly built medium-sized dinosaur having extremely long limbs and necks with small heads and big brains and large eyes
ornithomimidanlightly built medium-size theropods
ornithopodnbipedal herbivorous dinosaur
ornithopod dinosaurnbipedal herbivorous dinosaur
ornithopodanwidespread group including duck-billed dinosaurs and their early relatives (hadrosaurs, trachodon and iguanodon)
ornithopternheavier-than-air craft that is propelled by the flapping of wings
ornithorhynchidaenplatypus
ornithorhynchusntype genus of the family Ornithorhynchidae
ornithorhynchus anatinusnsmall densely furred aquatic monotreme of Australia and Tasmania having a broad bill and tail and webbed feet; only species in the family Ornithorhynchidae
ornithosisnan atypical pneumonia caused by a rickettsia microorganism and transmitted to humans from infected birds
orobanchaceaenbrown or yellow leafless herbs; sometimes placed in the order Scrophulariales
orogenynthe process of mountain formation (especially by the upward displacement of the earth's crust)
orographynthe science of mountains
oroidenalloy of copper and tin and zinc; used in imitation gold jewelry
orologynthe science of mountains
oronona university town in east central Maine on the Penobscot River north of Bangor
orontiumnone species of aquatic plant: golden club
orontium aquaticumnaquatic plant of the southeastern United States having blue-green leaves and a spadix resembling a club covered with tiny yellow flowers
oropharyngealaof or relating to or located near the oropharynx
oropharynxncavity formed by the pharynx at the back of the mouth
orotunds(of sounds) full and rich
orotundsostentatiously lofty in style
orozconMexican painter noted for his monumental murals (1883-1949)
orphanna young animal without a mother
orphannthe first line of a paragraph that is set as the last line of a page or column
orphanna child who has lost both parents
orphannsomeone or something who lacks support or care or supervision
orphansdeprived of parents by death or desertion
orphanvdeprive of parents
orphan sitena toxic waste area where the polluter could not be identified or the polluter refused to take action or pay for the cleanup
orphanagena public institution for the care of orphans
orphanagenthe condition of being a child without living parents
orphanedsdeprived of parents by death or desertion
orphanhoodnthe condition of being a child without living parents
orphans' asylumna public institution for the care of orphans
orphenadrinena skeletal muscle relaxant (trade name Norflex) used to treat severe muscle strain and Parkinsonism
orpheusn(Greek mythology) a great musician; when his wife Eurydice died he went to Hades to get her back but failed
orphicaascribed to Orpheus or characteristic of ideas in works ascribed to Orpheus
orphicshaving an import not apparent to the senses nor obvious to the intelligence; beyond ordinary understanding
orphreyna richly embroidered edging on an ecclesiastical vestment
orpimentna yellow mineral occuring in conjunction with realgar; an ore of arsenic
orpinnperennial northern temperate plant with toothed leaves and heads of small purplish-white flowers
orpinenperennial northern temperate plant with toothed leaves and heads of small purplish-white flowers
orpingtonnEnglish breed of large chickens with white skin
orrnCanadian hockey player (born 1948)
orrerynplanetarium consisting of an apparatus that illustrates the relative positions and motions of bodies in the solar system by rotation and revolution of balls moved by wheelwork; sometimes incorporated in a clock
orrisnfragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines
orrisnGerman iris having large white flowers with lavender-tinged falls and a fragrant rhizome
orrisrootnfragrant rootstock of various irises especially Florentine iris; used in perfumes and medicines
orson wellesnUnited States actor and filmmaker (1915-1985)
ortalisnchachalacas
orteganNicaraguan statesman (born in 1945)
ortega y gassetnSpanish philosopher who advocated leadership by an intellectual elite (1883-1955)
orthiconna now obsolete picture pickup tube in a television camera; electrons emitted from a photoemissive surface in proportion to the intensity of the incident light are focused onto the target causing secondary emission of electrons
orthiliana shrubby perennial rhizomatous evergreen herb; grows in damp coniferous woodlands in northern temperate regions
orthoboric acidna white or colorless slightly acid solid that is soluble in water and ethanol; used in the manufacture of glass and paper and adhesives and in detergents and as a flux in welding; also used as an antiseptic and food preservative
orthochoreana form of chorea in which spasms occur mainly when the patient is erect
orthochromatic filmna photographic film sensitive to green and blue and violet light
orthoclasena white or colored monoclinic feldspar
orthodontianthe branch of dentistry dealing with the prevention or correction of irregularities of the teeth
orthodonticaof or relating to or involving or practicing orthodontics
orthodontic bracesnan appliance that corrects dental irregularities
orthodontic treatmentndental treatment that corrects irregularities of the teeth or of the relation of the teeth to surrounding anatomy; treatment is usually by braces or mechanical aids
orthodonticsnthe branch of dentistry dealing with the prevention or correction of irregularities of the teeth
orthodontistna dentist specializing in the prevention or correction of irregularities of the teeth
orthodonturenthe branch of dentistry dealing with the prevention or correction of irregularities of the teeth
orthodoxaadhering to what is commonly accepted
orthodoxaof or pertaining to or characteristic of Judaism
orthodoxaof or relating to or characteristic of the Eastern Orthodox Church
orthodox catholic churchnderived from the Byzantine Church and adhering to Byzantine rites
orthodox churchnderived from the Byzantine Church and adhering to Byzantine rites
orthodox jewnJew who practices strict observance of Mosaic law
orthodox judaismnbeliefs and practices of a Judaic sect that strictly observes Mosaic law
orthodox judaismnJews who strictly observe the Mosaic law as interpreted in the Talmud
orthodox sleepna recurring sleep state during which rapid eye movements do not occur and dreaming does not occur; accounts for about 75% of normal sleep time
orthodoxynthe quality of being orthodox (especially in religion)
orthodoxyna belief or orientation agreeing with conventional standards
orthoepistna practitioner of orthoepy (especially one of the 17th or 18th century scholars who proposed to reform English spelling so it would reflect pronunciation more closely)
orthoepyna term formerly used for the part of phonology that dealt with the correct' pronunciation of words and its relation to correct' orthography
orthoepynthe way a word or a language is customarily spoken
orthogonalshaving a set of mutually perpendicular axes; meeting at right angles
orthogonalsstatistically unrelated
orthogonalsnot pertinent to the matter under consideration
orthogonal oppositionnthe relation of opposition between things at right angles
orthogonalitynthe quality of lying or intersecting at right angles
orthogonalitynthe relation of opposition between things at right angles
orthographicaof or relating to or expressed in orthography
orthographyna method of representing the sounds of a language by written or printed symbols
orthomorphic projectionna map projection in which a small area is rendered in its true shape
orthomyxovirusna group of viruses including those causing influenza
orthopaedicaof or relating to or employed in orthopedics
orthopaedicsnthe branch of medical science concerned with disorders or deformities of the spine and joints
orthopaedistna specialist in correcting deformities of the skeletal system (especially in children)
orthopedicaof or relating to or employed in orthopedics
orthopedicalaof or relating to or employed in orthopedics
orthopedicsnthe branch of medical science concerned with disorders or deformities of the spine and joints
orthopedistna specialist in correcting deformities of the skeletal system (especially in children)
orthophosphatena salt of phosphoric acid
orthophosphoric acidnan acid used in fertilizers and soaps: H3PO4
orthophosphorous acidna clear or yellow monobasic acid (H3PO2)
orthopneanform of dyspnea in which the person can breathe comfortably only when standing or sitting erect; associated with asthma and emphysema and angina pectoris
orthopristisna genus of Haemulidae
orthopristis chrysopterusnfound from Long Island southward
orthopternheavier-than-air craft that is propelled by the flapping of wings
orthopterangrasshoppers and locusts; crickets
orthopterannany of various insects having leathery forewings and membranous hind wings and chewing mouthparts
orthopteronnany of various insects having leathery forewings and membranous hind wings and chewing mouthparts
orthopterous insectnany of various insects having leathery forewings and membranous hind wings and chewing mouthparts
orthopticaof or relating to normal binocular vision
orthopticsntreatment of defects of binocular vision (such as strabismus and amblyopia) by nonsurgical measures (especially by exercises to strengthen the eye muscles)
orthoptistna specialist in orthoptics
orthoscopenan ophthalmoscope with a layer of water to neutralize the refraction of the cornea
orthostaticspertaining to an upright standing posture
orthostatic hypotensionnlow blood pressure occurring in some people when they stand up
orthotomusntailorbirds
orthotomus sutoriusntropical Asian warbler that stitches leaves together to form and conceal its nest
orthotropousa(of a plant ovule) completely straight with the micropyle at the apex
orthotropous ovulena completely straight ovule with the micropyle at the apex
ortilis vetula macallinof Mexico and Texas
ortolannbrownish Old World bunting often eaten as a delicacy
ortolan buntingnbrownish Old World bunting often eaten as a delicacy
ortygannany of several East Indian birds
orudisnnonsteroidal anti-inflammatory drug (trade names Orudis or Orudis KT or Oruvail)
orudis ktnnonsteroidal anti-inflammatory drug (trade names Orudis or Orudis KT or Oruvail)
orumiyehna city on the western side of Lake Urmia in northwestern Iran
oruvailnnonsteroidal anti-inflammatory drug (trade names Orudis or Orudis KT or Oruvail)
orville wrightnUnited States aviation pioneer who (with his brother Wilbur Wright) invented the airplane (1871-1948)
orwellnimaginative British writer concerned with social justice (1903-1950)
orwellianaof or relating to the works of George Orwell (especially his picture of a future totalitarian state)
orycteropodidaenaardvarks
orycteropusncoextensive with the family Orycteropodidae
orycteropus afernnocturnal burrowing mammal of the grasslands of Africa that feeds on termites; sole extant representative of the order Tubulidentata
oryctolagusnOld World rabbits
oryctolagus cuniculusncommon greyish-brown burrowing animal native to southern Europe and northern Africa but introduced elsewhere; widely domesticated and developed in various colors and for various needs; young are born naked and helpless
oryxnlarge African antelope with long straight nearly upright horns
oryx gazellanlarge South African oryx with a broad black band along its flanks
oryzanrice
oryza sativanyields the staple food of 50 percent of world's population
oryzomysnrice rats
oryzomys palustrisnhardy agile rat of grassy marshes of Mexico and the southeastern United States
oryzopsisnrice grass
oryzopsis hymenoidesnvaluable forage grass of dry upland areas and plains of western North America to northern Mexico
oryzopsis miliaceanperennial mountain rice native to Mediterranean region and introduced into North America
orzonpasta shaped like pearls of barley; frequently prepared with lamb in Greek cuisine
  
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