O
1: the blood group whose red cells carry neither the A nor B antigens; "people with type O blood are universal donors" [syn: {type O}, {group O}] 2: a nonmetallic bivalent element that is normally a c...
O level
1: the basic level of a subject taken in school
O ring
1: a gasket consisting of a flat ring of rubber or plastic; used to seal a joint against high pressure
O'Brien
1: Irish writer (born in 1932) [syn: {Edna O'Brien}]
O'Casey
1: Irish playwright (1880-1964) [syn: {Sean O'Casey}]
o'clock
1: according to the clock; "it's three o'clock in Tokyo now"
O'Connor
1: United States writer (1925-1964) [syn: {Flannery O'Connor}, {Mary Flannery O'Connor}]
o'er
1: throughout a period of time; "stay over the weekend" [syn: {over}]
O'Flaherty
1: Irish writer of short stories (1896-1984) [syn: {Liam O'Flaherty}]
O'Hara
1: United States writer (1905-1970) [syn: {John Henry O'Hara}]
O'Keeffe
1: United States painter (1887-1986) [syn: {Georgia Okeeffe}]
O'Neill
1: United States playwright (1888-1953) [syn: {Eugene O'Neill}, {Eugene Gladstone O'Neill}]
O'Toole
1: British actor (born in Ireland in 1932) [syn: {Peter O'Toole}, {Peter Seamus O'Toole}]
O. Henry
1: United States writer of short stories whose pen name was O. Henry (1862-1910) [syn: {Porter}, {William Sydney Porter}]
o.d.
1: dose too heavily; "The rock star overdosed and was found dead in his hotel room" [syn: {overdose}]
O.E.D.
1: an unabridged dictionary constructed on historical principles [syn: {Oxford English Dictionary}, {OED}]
o.k.
1: being satisfactory or in satisfactory condition; "an all-right movie"; "the passengers were shaken up but are all right"; "is everything all right?"; "everything's fine"; "things are okay"; "dinner...
oaf
1: an awkward stupid person [syn: {lout}, {clod}, {stumblebum}, {goon}, {lubber}, {lummox}, {lump}, {gawk}]
oafish
1: ill-mannered and coarse and contemptible in behavior or appearance; "was boorish and insensitive"; "the loutish manners of a bully"; "her stupid oafish husband"; "aristocratic contempt for the swin...
Oahu
1: an island of central Hawaii (between Molokai and Kauai); the chief island of the state [syn: {Oahu Island}]
Oahu Island
1: an island of central Hawaii (between Molokai and Kauai); the chief island of the state [syn: {Oahu}]
oak
1: the hard durable wood of any oak; used especially for furniture and flooring 2: a deciduous tree of the genus Quercus; has acorns and lobed leaves; "great oaks grow from little acorns" [syn: {oak t...
oak apple
1: oak gall caused by larvae of a cynipid wasp
oak blight
1: a black plant louse that lives on oaks and dogwoods
oak fern
1: bright blue-green fern widely distributed especially in damp acid woodlands of temperate northern hemisphere [syn: {Gymnocarpium dryopteris}, {Thelypteris dryopteris}]
Oak Leaf Cluster
1: a United States military decoration consisting of bronze or silver oak leaves and acorns awarded to anyone who has won a given medal before
oak tree
1: a deciduous tree of the genus Quercus; has acorns and lobed leaves; "great oaks grow from little acorns" [syn: {oak}]
oak-leaved goosefoot
1: annual European plant with spikes of greenish flowers and leaves that are white-hairy beneath; common as a weed in North America [syn: {oakleaf goosefoot}, {Chenopodium glaucum}]
oaken
1: consisting of or made of wood of the oak tree; "a solid oak table"; "the old oaken bucket"
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Oakland
1: a city in western California on San Francisco Bay opposite San Francisco; primarily and industrial urban center
oakleaf goosefoot
1: annual European plant with spikes of greenish flowers and leaves that are white-hairy beneath; common as a weed in North America [syn: {oak-leaved goosefoot}, {Chenopodium glaucum}]
Oakley
1: United States sharpshooter who was featured in Buffalo Bill's Wild West Show (1860-1926) [syn: {Annie Oakley}]
oakum
1: loose hemp or jute fiber obtained by unravelling old ropes; when impregnated with tar it was used to caulk seams and pack joints in wooden ships
oar
1: an implement used to propel or steer a boat
oarfish
1: thin deep-water tropical fish 20 to 30 feet long having a red dorsal fin [syn: {king of the herring}, {ribbonfish}, {Regalecus glesne}] [also: {oarfishes} (pl)]
oarlock
1: a holder attached to the gunwale of a boat that holds the oar in place and acts as a fulcrum for rowing [syn: {peg}, {pin}, {thole}, {tholepin}, {rowlock}]
oarsman
1: someone who rows a boat [syn: {rower}]
OAS
1: an association of countries in the western hemisphere; created in 1948 to promote military and economic and social and cultural cooperation [syn: {Organization of American States}]
oasis
1: a fertile tract in a desert (where the water table approaches the surface) 2: a shelter serving as a place of safety or sanctuary [syn: {haven}] [also: {oases} (pl)]
oast
1: a kiln for drying hops
oast house
1: a building containing an oast (a kiln for drying hops); usually has a conical or pyramidal roof
oat
1: annual grass of Europe and North Africa; grains used as food and fodder (referred to primarily in the plural: `oats') 2: seed of the annual grass Avena sativa (spoken of primarily in the plural as ...
oat cell carcinoma
1: highly malignant carcinoma composed of small round or egg-shaped cells with little cytoplasm; lung cancers are frequently oat cell carcinomas [syn: {small cell carcinoma}]
oatcake
1: thin flat unleavened cake of baked oatmeal
oaten
1: of or related to or derived from oats; "oaten bread"
Oates
1: English conspirator who claimed that there was a Jesuit plot to assassinate Charles II (1649-1705) [syn: {Titus Oates}] 2: United States writer (born in 1938) [syn: {Joyce Carol Oates}]
oath
1: profane or obscene expression usually of surprise or anger; "expletives were deleted" [syn: {curse}, {curse word}, {expletive}, {swearing}, {swearword}, {cuss}] 2: a commitment to tell the truth (e...
oatmeal
1: porridge made of rolled oats [syn: {burgoo}] 2: meal made from rolled or ground oats [syn: {rolled oats}]
Oaxaca
1: a city of southeastern Mexico [syn: {Oaxaca de Juarez}]
Ob
1: a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea [syn: {Ob River}] 2: the branch of medicine dealing with childbirth and care of the mothe...
Ob River
1: a major river of western Siberia; flows generally northward and westward to the Gulf of Ob and the Kara Sea [syn: {Ob}]
Obadiah
1: a Hebrew minor prophet [syn: {Abdias}] 2: an Old Testament book telling Obadiah's prophecies; the shortest book in the Christian Bible [syn: {Abdias}, {Book of Obadiah}]
obbligato
1: a persistent but subordinate motif [syn: {obligato}] 2: a part of the score that must be performed without change or omission [syn: {obligato}]
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