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Onions,Charles Talbut
On·ions (ŭnʹyənz), Charles Talbut. 1873-1965. British philologist and lexicographer who was coeditor of the Oxford English Dictionary from 1914 to 1933. * * *
/un"yeuhn skin'/, n. a thin, lightweight, translucent, glazed paper, used esp. for making carbon copies. [1875-80, Amer.; ONION + SKIN] * * *
onion snow n. Chiefly Pennsylvania A light snow in late spring, after onions have been planted. * * *
/oh nich"euh/, n. a city in SW Nigeria, on the Niger River. 220,000. * * * ▪ Nigeria       port and market town in Anambra state, southern Nigeria. The town lies on ...
Onitsha market literature
▪ Nigerian literature       20th-century genre of sentimental, moralistic novellas and pamphlets produced by a semiliterate school of writers (students, fledgling ...
/ong"keuh los'/, n. fl. 2nd century A.D., author of a Targum of the Pentateuch known as the Targum of Onkelos. * * *
/ong"keuhs/, adj. Australian Slang. unpleasant, unattractive, or unacceptable; bad. [1910-15; orig. uncert.] * * *
/on"lap', awn"-/, n. Geol. 1. the advance of a sea beyond its former shore. 2. the layer or layers of sedimentary rock formed on a sea floor as a result of this advance. Cf. ...
n. /on"lay', awn"-/; v. /on lay", awn-/, n., v., onlaid, onlaying. n. 1. an overlay, esp. one in relief. 2. Dentistry. an inlay that restores the occlusal surface of a ...
Onley, Toni
▪ 2005 Norman Antony Onley        Canadian painter (b. Nov. 20, 1928, Douglas, Isle of Man—d. Feb. 29, 2004, Maple Ridge, B.C.), was internationally known for his ...
online [än′līn′] adj. 1. designating or of equipment directly controlled by the central processing unit of a computer 2. connected to and ready to receive data from or ...
online gaming
▪ computer science Introduction        electronic game played over a computer network, particularly over the Internet.       Electronic gaming worlds generate ...
online system
▪ communications formerly  called Videotex,        any electronic interactive system that delivers information to users via telephone lines to personal computers ...
on·load (ŏnʹlōd', ônʹ-) v. on·load·ed, on·load·ing, on·loads v. tr. To load (a vehicle or container). v. intr. To load a vehicle or container. * * *
/on"look'euhr, awn"-/, n. spectator; observer; witness. [1600-10; ON + LOOKER, after v. phrase look on] * * *
/on"look'ing, awn"-/, adj. 1. looking on; observing; perceiving. 2. looking onward or foreboding. [1655-65; ON + LOOKING, after v. phrase look on] * * *
/ohn"lee/, adv. 1. without others or anything further; alone; solely; exclusively: This information is for your eyes only. 2. no more than; merely; just: If it were only true! I ...
Only Fools and Horses
a BBC television comedy series about two working-class brothers living in south London. Most of the humour comes from their attempts to make money without actually working. In ...
Onn bin Jaafar, Dato'
▪ Malaysian politician born 1895, Johor Bahru, Malaya [now in Malaysia] died January 19, 1962, Johor Bahru       Malayan political figure who played a leading role in ...
/on'euh gah"teuh/; Japn. /awn"nah gah"tah/, n. a male actor in kabuki who performs female roles. [1900-05; < Japn] * * *
Ono Tōfū
▪ Japanese calligrapher born 894, Japan died 964, Japan       Japanese calligrapher known as one of the Sanseki (“Three Brush Traces”), in effect the first ...
Onoe Baiko VII
▪ 1996       (SEIZO TERASHIMA), Japanese Kabuki actor (b. Aug. 31, 1915, Tokyo, Japan—d. March 24, 1995, Tokyo), was revered as the country's leading postwar onnagata ...
Onoe Shōroku II
▪ Japanese actor original name  Yutaka Fujima   born March 28, 1913, Tokyo, Japan died June 25, 1989, Tokyo       Japanese Kabuki actor, one of the foremost ...
—onomasiologic /on'euh may'see euh loj"ik, -may'zee-/, onomasiological, adj. /on'euh may'see ol"euh jee, -may'zee-/, n. the study of the means of expressing a given ...
/on'euh mas"tik/, adj. 1. of or pertaining to proper names. 2. of or pertaining to onomastics. 3. Law. (of a signature) written in the handwriting other than that of the ...
/on'euh mas"ti kon', -keuhn/, n. 1. a list or collection of proper names. 2. a list or collection of specialized terms, as those used in a particular field or subject ...
—onomastician /on'euh meuh stish"euhn/, n. /on'euh mas"tiks/, n. (used with a sing. v.) the study of the origin, history, and use of proper names. [1930-35; see ONOMASTIC, ...
—onomatologic /on'euh mat'l oj"ik/, onomatological, adj. —onomatologically, adv. —onomatoloist, n. /on'euh meuh tol"euh jee/, n. onomastics. [1840-50; < MGk onomatología, ...
—onomatopoeic, onomatopoetic /on'euh mat'euh poh et"ik/, adj. —onomatopoeically, onomatopoetically, adv. /on'euh mat'euh pee"euh, -mah'teuh-/, n. 1. the formation of a word, ...
See onomatopoeia. * * *
See onomatopoeic. * * *
See onomatopoeic. * * *
See onomatopoeic. * * *
▪ Japan  city, Hiroshima ken (prefecture), Honshu, Japan, facing the Inland Sea. The city's port opened in 1168 and served for about 500 years as a rice shipment centre and ...
—Onondagan, adj. /on'euhn daw"geuh, -dah"-, -day"-/, n., pl. Onondagas, (esp. collectively) Onondaga for 1. 1. a member of a tribe of Iroquoian Indians formerly inhabiting the ...
Onondaga Lake
Onondaga Lake 〚see ONONDAGA〛 salt lake northwest of Syracuse, N.Y.: c. 5 sq mi (13 sq km) * * *
See Onondaga. * * *
Office of Naval Research. * * *
—onrushing, adj. /on"rush', awn"-/, n. a strong forward rush, flow, etc. [1835-45; ON + RUSH1, after the v. phrase rush on] Syn. onset, torrent, flood, charge. * * *
See onrush. * * *
➡ Office for National Statistics. * * *
/on"sah geuhr, awn"-/, n. Lars, 1903-76, U.S. chemist, born in Norway: Nobel prize 1968. * * *
Onsager, Lars
born Nov. 27, 1903, Oslo, Nor. died Oct. 5, 1976, Coral Gables, Fla., U.S. Norwegian-born U.S. chemist. He immigrated to the U.S. and taught principally at Yale University. His ...
On·sa·ger (ônʹsä'gər), Lars. 1903-1976. Norwegian-born American chemist. He won a 1968 Nobel Prize for the development of a system of equations in thermodynamics. * * *
on·screen or on-screen (ŏnʹskrēnʹ, ônʹ-) adj. & adv. 1. As shown on a movie, television, or display screen. 2. Within public view; in public. * * *
/on"set', awn"-/, n. 1. a beginning or start: the onset of winter. 2. an assault or attack: an onset of the enemy. 3. Phonet. the segment of a syllable preceding the nucleus, as ...
/on"shawr", -shohr", awn"-/, adv. 1. onto or in the direction of the shore from a body of water: a breeze blowing onshore. 2. in or on a body of water, close to or parallel with ...
/on"suyd", awn"-/, adj., adv. Sports. not offside; being within the prescribed line or area at the beginning of or during play or a play. [1840-50; ON + SIDE1] * * *
onside kick
Football. a kickoff deliberately kicked a short distance in an attempt by the kicking team to regain possession of the ball by recovering it after it has traveled forward the ...
onside kick n. Football A kickoff in which the ball carries just far enough, at least ten yards, to be recovered legally by the kicking team. * * *
/on"slawt', awn"-/, n. an onset, assault, or attack, esp. a vigorous one. [1615-25; < D aanslag a striking, (earlier) attack (equiv. to aan ON + slag blow, stroke; akin to SLAY), ...
/onz"loh/, n. George, 1784-1853, French composer. * * *
Onslow Ford, Gordon
▪ 2004       British-born American painter (b. Dec. 26, 1912, Wendover, Buckinghamshire, Eng.—d. Nov. 9, 2003, Inverness, Calif.), was associated with the Paris ...
/on"stayj", awn"-/, adv. 1. on or onto the stage (opposed to offstage): The director shouted, "Onstage, everybody!" adj. 2. of, pertaining to, or used in the acting area, or that ...
onstream or on-stream [än′strēm′] adv. into operation or production [a new refinery coming onstream] * * *
Ont abbrev. Ontario * * *
ont- pref. Variant of onto-. * * *
Ontario. * * *
Ontake, Mount
▪ mountain, Japan Japanese  Ontake-san,         mountain, rising to an elevation of 10,049 feet (3,063 m) on the boundary of Gifu and Nagano prefectures, central ...
—Ontarian, Ontaric /on tar"ik/, adj., n. /on tair"ee oh'/, n. 1. a province in S Canada, bordering on the Great Lakes. 8,131,618; 412,582 sq. mi. (1,068,585 sq. km). Cap.: ...
Ontario Science Centre
▪ museum, Toronto, Ontario, Canada       in Toronto, Ont., Can., a science and technology museum. Founded in 1964, the centre offers major collections in aeronautics, ...
Ontario, flag of
▪ Flag History       Canadian provincial flag consisting of a red field (background) bearing the Union Jack (United Kingdom, flag of the) as its canton and the ...
Ontario, Lake
Smallest and easternmost of the Great Lakes of North America. Bounded by New York and Ontario, and with the U.S.-Canada border passing through it, the lake is roughly ...
Ontario, Lake The smallest of the Great Lakes, between southeast Ontario, Canada, and northwest New York. The St. Lawrence Seaway and Welland Ship Canal connect with the lake to ...
/on"tik/, adj. Philos. possessing the character of real rather than phenomenal existence; noumenal. [1940-45; < Gk ont- (see ONTO-) + -IC] * * *
/on"tooh, awn"-/; unstressed /on"teuh, awn"-/, prep. 1. to a place or position on; upon; on: to get onto a horse. 2. Informal. in or into a state of awareness about: I'm onto ...
onto function
Math. a function from one set to a second set, the range of which is the entire second set. Also called surjection. * * *
a combining form meaning "being," used in the formation of compound words: ontogeny. [ < NL < Gk ont- (s. of ón, neut. prp. of eînai to be) + -o- -O-] * * *
on·to·gen·e·sis (ŏn'tō-jĕnʹĭ-sĭs) n. pl. on·to·gen·e·ses (-sēz') See ontogeny. * * *
See ontogeny. * * *
See ontogenetic. * * *
See ontogenetic. * * *
See ontogenetic. * * *
—ontogenetic /on'teuh jeuh net"ik/, ontogenetical, ontogenic, adj. —ontogenetically, ontogenically, adv. —ontogenist, n. /on toj"euh nee/, n. Biol. the development or ...
on·to·log·i·cal (ŏnʹtə-lŏjʹĭ-kəl) adj. 1. Of or relating to ontology. 2. Of or relating to essence or the nature of being. 3. Of or relating to the argument for the ...
ontological argument
Philos. an a priori argument for the existence of God, asserting that as existence is a perfection, and as God is conceived of as the most perfect being, it follows that God must ...
See ontological. * * *
/on tol"euh jiz'euhm/, n. Theol. the doctrine that the human intellect has an immediate cognition of God as its proper object and the principle of all its cognitions. [1860-65; ...
See ontology. * * *
/on tol"euh juyz'/, v.t., ontologized, ontologizing. to express in ontological terms; regard from an ontological viewpoint. Also, esp. Brit., ontologise. [1840-50; ONTOLOG(Y) + ...
—ontological /on'tl oj"i keuhl/, ontologic, ontologistic /on tol'euh jis"tik/, adj. —ontologist, n. /on tol"euh jee/, n. 1. the branch of metaphysics that studies the nature ...
Ontong Java Atoll
▪ atoll, Solomon Islands formerly  Lord Howe Islands         atoll in the country of Solomon Islands, southwestern Pacific Ocean, 160 miles (257 km) north of Santa ...
/oh"neuhs/, n., pl. onuses. 1. a difficult or disagreeable obligation, task, burden, etc. 2. burden of proof. Cf. onus probandi. 3. blame or responsibility. [1630-40; < L: load, ...
onus probandi
/oh"noos prddoh bahn"dee/; Eng. /oh"neuhs proh ban"duy, -dee/, Latin. the burden of proof. * * *
Onverwacht series
▪ geology       division of Archean rocks (the Archean Eon lasted from 3.96 to 2.5 billion years ago) in the Swaziland region of southern Africa. The Onverwacht series ...
/on"weuhrd, awn"-/, adv. Also, onwards. 1. toward a point ahead or in front; forward, as in space or time. 2. at a position or point in advance. adj. 3. directed or moving onward ...
Onward, Christian Soldiers
a popular Christian hymn with a strong rhythm that is often sung in British schools. The music was written by Arthur Sullivan. * * *
/oh nik"ee euh/, n. Pathol. inflammation of the matrix of the nail. [1855-60; < NL, equiv. to Gk onych-, s. of onyx nail (see ONYX) + NL -ia -IA] * * *
on·y·chol·y·sis (ŏn'ĭ-kŏlʹĭ-sĭs) n. The separation or loosening of a fingernail or toenail from its nail bed.   [New Latin : Greek onux, onukh-, nail, claw; see onyx ...
—onychophagist /on'euh kof"euh jist/, n. /on'i koh fay"jeuh, -jee euh/, n. Psychiatry. the practice of biting one's nails, esp. when done habitually and as a symptom of ...
/on'i kof"euhr euhn/, n. any small, predatory, caterpillarlike animal of the phylum Onychophora, common in tropical forests, having stubby legs ending in pincers. [1885-90; < NL ...
/on"iks, oh"niks/, n. 1. Mineral. a variety of chalcedony having straight parallel bands of alternating colors. Cf. Mexican onyx. 2. (not used technically) an unbanded chalcedony ...
onyx marble
1. See Mexican onyx. 2. any compact, banded calcareous tufa that can be given a high polish. [1890-95] * * *
/oh nik"sis/, n. Pathol. an ingrowing of a fingernail or toenail. [ < Gk onych- (s. of ónyx) nail (see ONYX) + -SIS] * * *
OO gauge
/oh"oh"/ a model railroad gauge of 3/4 in. (19 mm). [1920-25] * * *
a combining form meaning "egg," used in the formation of compound words: oogamous. [ < Gk oio-, comb. form of oión EGG1] * * *
/oh"euh blast'/, n. a primordial cell from which the ovum is developed. [OO- + -BLAST] * * *
/oh"euh sist'/, n. Biol. the encysted zygotic stage in the life cycle of some sporozoans. [1870-75; OO- + -CYST] * * *
/oh"euh suyt'/, n. Cell Biol. an immature egg cell of the animal ovary; in humans, one oocyte matures during the menstrual cycle, becoming an ootid and then an ovum, while ...
OOD abbrev. 1. Officer of the Day 2. Officer of the Deck * * * OOD abbr. officer of the deck. * * *
/oohd"lz/, n. (sometimes used with a sing. v.) Informal. a large quantity: oodles of love; oodles of money. [1865-70; orig. uncert.] * * *
▪ South Australia, Australia       town, northern South Australia. It lies on the Neales River, southwest of the Simpson Desert. Founded in 1890, Oodnadatta served as ...
—oogamous /oh og"euh meuhs/, adj. —oogamy, n. /oh euh gam"eet, -geuh meet"/, n. Cell Biol. one of a pair of structurally dissimilar gametes, the female gamete being large and ...
oogamous [ō äg′ə məs] adj. 〚 OO- + -GAMOUS〛 characterized by the uniting of a large, nonmotile egg and a small, active sperm for reproduction oogamy [ō ...
See oogamous. * * *
—oogenetic /oh'euh jeuh net"ik/, adj. /oh'euh jen"euh sis/, n. Cell Biol. the origin and development of the ovum. [1890-95; OO- + -GENESIS] * * * ▪ ...
See oogenesis. * * *
See oogonium. * * *
—oogonial adj. /oh'euh goh"nee euhm/, n., pl. oogonia /-nee euh/, oogoniums. Biol. 1. one of the undifferentiated germ cells giving rise to oocytes. 2. the one-celled female ...
/ooh/, interj. 1. (used to express amazement, satisfaction, excitement, etc.) n. 2. the exclamation "ooh." v.i. 3. to utter or exclaim "ooh." 4. ooh and aah, to exclaim in wonder ...
Ōoka Makoto
▪ Japanese poet and literary critic born Feb. 16, 1931, Mishima City, Shizuoka prefecture, Japan       prolific Japanese poet and literary critic who was largely ...
Ōoka Shōhei
▪ Japanese author born March 6, 1909, Tokyo, Japan died Dec. 25, 1988, Tokyo       Japanese novelist famous for his depiction of the fate of Japanese soldiers during ...
Ōoka Tadasuke
▪ Japanese jurist born 1677, Edo [now Tokyo], Japan died January 1752, Edo       highly respected Japanese judge of the Tokugawa period ...
—ookinetic /oh'euh ki net"ik, -kuy-/, adj. /oh'euh ki nee"sis, -kuy-/, n. Cell Biol. the series of nuclear changes occurring in the ovum during maturation and ...
/ooh"leuh kahn'/, n., pl. oolachans, (esp. collectively) oolachan. Chiefly Canadian. eulachon. * * *
o·o·lem·ma (ō'ə-lĕmʹə) n. See zona pellucida.   [oo- + Greek lemma, husk; see lemma2.] * * *
—oolitic /oh'euh lit"ik/, adj. /oh"euh luyt'/, n. Geol. a limestone composed of minute rounded concretions resembling fish roe, in some places altered to ironstone by ...
/oh"euh lith/, n. Geol. any of the component concretions of a piece of oolite. [1780-90; OO- + -LITH] * * *
See oolite. * * *
See oology. * * *
See oologic. * * *
See oologic. * * *
See oologic. * * *
—oological /oh'euh loj"i keuhl/, adj. —oologist, n. /oh ol"euh jee/, n. the branch of ornithology that studies birds' eggs. [1825-35; OO- + -LOGY] * * *
/ooh"lawng', -long'/, n. a brown or amber tea grown in China and Taiwan and partially fermented before being dried. [1850-55; < Chin wúlóng lit., black dragon, or < a cognate ...
Oom Paul
/oohm poh"ool/. See Kruger, Stephanus Johannes Paulus. * * *
oomiac or oomiak [o͞o′mē ak΄] n. UMIAK * * *
oo·mi·ak (o͞oʹmē-ăk') n. Variant of umiak. * * *
/oohm"pah, oom"-/, n. 1. a repetitious bass accompaniment in music typically provided by brasses. adj. 2. marked by an oompah: oompah band. Also, oompah-pah /oohm"pah pah', ...
/oomf/, n. Informal. 1. energy; vitality; enthusiasm. 2. sex appeal. [1935-40, Amer.; imit. of the sound made during exertion, as in lifting a heavy object] * * *
/oh'euh muy"seet, -muy seet"/, n. any of various algaelike fungi constituting the phylum Oomycota of the kingdom Fungi (or the class Oomycetes of the kingdom Plantae), ...
/oh'euh muy koh"teuh/, n.pl. the oomycetes considered as belonging to the phylum Oomycota of the kingdom Fungi. [ < NL; see OO-, MYC-, -OTA] * * * ▪ phylum of ...
/ooh"neuh/, n. a female given name. Also, Oonagh. * * *
/oh'euh feuh rek"teuh mee/, n., pl. oophorectomies. Surg. the operation of removing one or both ovaries; ovariectomy. [1870-75; < NL oophor(on) ovary (neut. of Gk oiophóros ...
/oh'euh feuh ruy"tis/, n. Pathol. inflammation of an ovary, usually combined with an inflammation of the Fallopian tubes; ovaritis. [1870-75; < NL oophor(on) ovary (see ...
oophoro- [ō′ō fə rō΄, ō′əfə rō΄] 〚< ModL oöphoron, ovary < Gr ōion,EGG1 + -phoros, bearing < pherein, to BEAR1〛 combining form ovary or ovaries [oophoritis]: ...
—oophytic /oh'euh fit"ik/, adj. /oh"euh fuyt'/, n. Bot. the gametophyte of a moss, fern, or liverwort, resulting from the development of a fertilized egg. [1885-90; OO- + ...
/oops, oohps/, interj. (used to express mild dismay, chagrin, surprise, etc., as at one's own mistake, a clumsy act, or social blunder.) [1925-30; orig. uncert.] * * *
Oort cloud
/awrt, ohrt/, Astron. a region of the solar system far beyond the orbit of Pluto in which billions of comets move in nearly circular orbits unless one is pulled into a highly ...
Oort, Jan Hendrik
▪ Dutch astronomer born April 28, 1900, Franeker, Neth. died Nov. 5, 1992, Leiden       Dutch astronomer who was one of the most important figures in 20th-century ...
Oort cloud (ôrt, ōrt) n. A swarm of comets orbiting the sun at a distance of one to two light-years, proposed as a source of comets that pass near the sun.   [After Jan ...
/oor"ee/, adj. Scot. ourie. * * *
oosperm [ō′ō spʉrm΄, ō′əspʉrm΄] n. 〚 OO- + -SPERM〛 obs. var. of ZYGOTE * * *
/oh"euh sfear'/, n. Biol. an unfertilized egg within an oogonium. [1870-75; OO- + -SPHERE] * * *
—oosporic /oh'euh spawr"ik, -spor"-/, oosporous /oh os"peuhr euhs, oh'euh spawr"euhs, -spohr"-/, adj. /oh"euh spawr', -spohr'/, n. Biol. a fertilized egg within an ...
See oospore. * * *
See oosporic. * * *
/ohst/, n. Jacob van /yah"kawp vahn/, 1600?-71, and his son, Jacob van, 1639?-1713, Flemish painters. * * *
Oostende [ōs ten′də] Fl. name for OSTEND * * * Oost·en·de (ō-stĕnʹdə) See Ostend. * * *
Oosterbaan, Bennie
▪ American athlete byname of  Benjamin Gaylord Oosterbaan   born Feb. 24, 1906, Muskegon, Mich., U.S. died Oct. 25, 1990, Ann Arbor, Mich.       American collegiate ...
out of town. Also, O.O.T. * * *
—oothecal, adj. /oh'euh thee"keuh/, n., pl. oothecae /-see/. a case or capsule containing eggs, as that of certain gastropods and insects. Also, called egg case. [1850-55; < ...
See ootheca. * * *
/oh"euh tid/, n. Cell Biol. the cell that results from the meiotic divisions of an oocyte and matures into an ovum. [1905-10; OO- + (SPERMA)TID] * * *
ooze1 /oohz/, v., oozed, oozing, n. v.i. 1. (of moisture, liquid, etc.) to flow, percolate, or exude slowly, as through holes or small openings. 2. to move or pass slowly or ...
ooze leather
leather prepared from calfskin or other skin and having a soft, velvety finish on the flesh side. [1885-90] * * *
See oozy1,2. * * *
See oozily. * * *
oozy1 —ooziness, n. /ooh"zee/, adj., oozier, ooziest. 1. exuding moisture. 2. damp with moisture. [1705-15; OOZE1 + -Y1] oozy2 —oozily, adv. —ooziness, n. /ooh"zee/, adj., ...
/op/, n. See op art. * * *
observation post. Also, O.P. * * *
op art
—op-art, adj. —op artist. a style of abstract art in which lines, forms, and space are organized in such a way as to provide optical illusions of an ambiguous nature, as ...
var. of ob- (by assimilation) before p: oppose. * * *
/op"ed'/, n. a newspaper page devoted to signed articles by commentators, essayists, humorists, etc., of varying viewpoints: the Op-Ed of today's New York Times. Also called ...
opus. * * *
1. opera. 2. operation. 3. opposite. 4. opus. * * *
op. cit.
/op" sit"/ in the work cited. [ < L opere citato] * * *
op. cit. abbr. Latin opere citato (in the work cited). * * *
U.S. Govt. Office of Price Administration: the federal agency (1941-46) charged with regulating rents and the distribution and prices of goods during World War II. * * *
/oh'peuh lok"euh/, n. a town in S Florida. 14,460. * * *
o·pac·i·fi·er (ō-păsʹə-fī'ər) n. A chemical agent added to a material, such as rocket propellant, to make it opaque. * * *
—opacification, n. —opacifier, n. /oh pas"euh fuy'/, v., opacified, opacifying. v.t. 1. to cause to become opaque. v.i. 2. to become opaque. [1910-15; < L opac(us) shaded + ...
/oh pas"i tee/, n., pl. opacities. 1. the state or quality of being opaque. 2. something opaque. 3. the degree to which a substance is opaque; capacity for being opaque. 4. ...
/oh pay"keuhs/, adj. Meteorol. (of a cloud) dense enough to obscure the sun or moon. [1615-25; < NL, L opacus; see OPAQUE] * * *
/oh"peuh/, n. a large, deep-bodied, brilliantly colored, oceanic food fish, Lampris regius. [1740-50; < an unidentified West African source] * * * ▪ fish also called ...
/oh"peuhl/, n. 1. a mineral, an amorphous form of silica, SiO2 with some water of hydration, found in many varieties and colors, including a form that is milky white. 2. an ...
/oh"peuhl/, n. a female given name. * * * A hydrated, noncrystalline silica mineral used extensively as a gemstone. Its chemical composition is similar to that of quartz but ...
opal glass
a translucent or opaque glass, usually of a milky white hue. [1865-70] * * *
/oh'peuh les"/, v.i., opalesced, opalescing. to exhibit a play of colors like that of the opal. [1810-20; back formation from OPALESCENT] * * *
See opalescent. * * *
—opalescence, n. —opalescently, adv. /oh'peuh les"euhnt/, adj. 1. exhibiting a play of colors like that of the opal. 2. having a milky iridescence. [1805-15; OPAL + ...
/oh"peuhl uy'/, n., pl. opaleyes, (esp. collectively) opaleye. a green game fish, Girella nigricans, common off rocky shores from California southward, having opalescent blue ...
/oh"peuh lin, -leen', -luyn'/, adj. of or like opal; opalescent. [1775-85; OPAL + -INE1] * * *
opaline glass
      usually opaque glass or crystal, either white or coloured, made in France between approximately 1810 and 1890. Opaline resembles the milk glass of 16th-century ...
▪ protozoan       (subphylum Opalinata), any of about 150 protozoans found in the intestinal tracts of amphibians and some other animals. The nuclei of opalinids vary in ...
Opaliński, Krzysztof
▪ Polish writer born 1609, Sieraków, Poland died December 7, 1655, Włoszakowice       Polish statesman and writer who was a noted satirist.       A highly ...
—opaquely, adv. —opaqueness, n. /oh payk"/, adj., n., v., opaqued, opaquing. adj. 1. not transparent or translucent; impenetrable to light; not allowing light to pass ...
opaque projector
—opaque projecting. a machine for projecting opaque objects, as books, on a screen, by means of reflected light. [1950-55] * * *
See opaque. * * *
See opaquely. * * *
opaque projector n. A projector used to view images of nontransparent materials, such as printed sheets or drawings. * * *
Oparin, Aleksandr
▪ Russian biochemist in full  Aleksandr Ivanovich Oparin   born Feb. 18 [March 2, New Style], 1894, Uglich, near Moscow, Russia died April 21, 1980  Russian biochemist ...
op art also Op Art (ŏp) n. A school of abstract art characterized by the use of geometric shapes and brilliant colors to create optical illusions, as of motion, and free the ...
▪ Croatia Italian  Abbazia,         resort town, one of the best-known coastal resorts in Istria, republic of Croatia, situated on the Kvarner (gulf) of the Adriatic ...
▪ Czech Republic German  Troppau , Polish  Opawa        city, northeastern Czech Republic. It lies along the Opava River near the Polish border and is northwest of ...
/ohp/, adj., v.t., v.i., oped, oping. Literary. open. * * *
/oh"pek/, n. an organization founded in 1960 of nations that export large amounts of petroleum: formed to establish oil-exporting policies and set prices. [O(rganization of) ...
/oh pech'euhn kah"noh/, n. c1545-1644, Algonquian leader, brother of Powhatan: led Jamestown massacre 1622. * * *
Opel AG
▪ German company in full  Adam Opel Ag,         German automotive company, a wholly owned subsidiary of the U.S. General Motors Corporation, specializing in the ...
Opel, Fritz von
▪ German industrialist born May 4, 1899, Rüsselsheim, Ger. died April 8, 1971, Saint Moritz, Switz.       German automotive industrialist who took part, with Max ...
/oh'peuh luy"keuh/, n. a city in E Alabama. 21,896. * * * ▪ Alabama, United States       city, seat (1866) of Lee county, eastern Alabama, U.S. It is situated about 15 ...
/op'euh looh"seuhs/, n. a city in S Louisiana. 18,903. * * * ▪ Louisiana, United States       city, seat (1805) of St. Landry parish, south-central Louisiana, U.S. It ...
—openly, adv. —openness, n. /oh"peuhn/, adj. 1. not closed or barred at the time, as a doorway by a door, a window by a sash, or a gateway by a gate: to leave the windows ...
open account.
See current account (def. 1). [1895-1900] * * *
open admissions
Educ. a policy of admitting applicants to an institution, esp. a university, regardless of previous academic record or grades. Also called open access, open ...
open air
the outdoors. [1520-30] * * *
open bar
a bar at a reception that serves drinks whose cost has been borne by the host, an admission charge, a sponsor, etc.: Before the banquet there will be an open bar from 5 to 7 P.M. ...
open book
someone or something easily understood or interpreted; something very clear: The child's face is an open book. [1850-55] * * *
open call
an audition, esp. for actors or dancers, open to anyone wishing to try out. * * *
open chain
—open-chain, adj. Chem. a series of atoms linked in a chain not joined together at its ends, and so represented in its structural formula. Cf. closed chain. [1880-85] * * *
open circuit
—open-circuit, adj. Elect. a discontinuous circuit through which no current can flow. Cf. closed circuit. [1820-30] * * *
open city
1. a city that, during a war, is officially declared demilitarized and open to occupation, and that will consequently not be defended, in order to spare it, under international ...
open classroom
Educ. 1. a spacious instructional area shared by several groups or classes in elementary school, permitting more individualized, less supervised project learning and movement of ...
open cluster
Astron. a comparatively young, irregularly shaped group of stars, often numbering up to several hundred, and held together by mutual gravitation; usually found along the central ...
open communion
Eccles. a communion service in which members of all denominations can participate. Cf. close communion, intercommunion. * * *
open convention
U.S. Politics. a party convention at which delegates are free to vote for the candidate of their choice. Cf. brokered convention. [1955-60] * * *
open couplet
a couplet that concludes with a run-on line. Cf. closed couplet. * * *
open cover
Math. a cover of a set consisting entirely of open sets. * * *
open dating
the practice of putting a freshness date on food packages. [1970-75] * * *
open diapason.
See under diapason (def. 4). [1870-75] * * *
open die
Metalworking. a die of flat, concave, or hollow V shape that only minimally restricts lateral flow. * * *
open door
—open-door, adj. 1. the policy of admitting people of all nationalities or ethnic groups to a country upon equal terms, as for immigration. 2. the policy or practice of trading ...
Open Door policy
Statement of U.S. foreign policy toward China. Issued by U.S. secretary of state John Hay (1899), the statement reaffirmed the principle that all countries should have equal ...
open enrollment
1. See open admissions. 2. enrollment at a public school of choice rather than compulsory assignment to a particular school because of where one lives. [1960-65] * * *
open field
Football. any area of the playing field away from the heavily trafficked line of scrimmage, in which the defense is widely scattered. Also called broken field. * * *
open field system
➡ strip-farming * * *
open flash
Photog. a photographic technique employing a flash fired while the camera shutter is held open. * * *
open fracture.
See compound fracture. * * *
open frame
Bowling. a frame in which a bowler fails to make a strike or a spare. * * *
open hand knot.
See loop knot. * * *
open house
1. a party or reception during which anyone who wishes may visit to share in a celebration, meet a special guest, etc. 2. a time during which a school, institution, etc., is open ...
open housing
—open-housing, adj. the sale and rental of private housing free of discriminatory practices or policies. Also called fair housing. [1965-70, Amer.] * * *
open juncture
Phonet. a transition between successive sounds marked by a break in articulatory continuity, as by a pause or the modification of a preceding or following sound, and often ...
open learning
➡ adult education * * *
open letter
—open-letter, adj. a letter, often of protest or criticism, addressed to a specific person, but intended to be brought to public attention. [1875-80] * * *
open market
—open-market, adj. an unrestricted competitive market in which any buyer and seller is free to participate. [1760-70] * * *
open market operation
Any of the purchases and sales of government securities and commercial paper by a central bank in an effort to regulate the money supply and credit conditions. Open market ...
open marriage
a marriage in which the partners agree that each is free to have sexual relationships with other partners. [1970-75] * * *
open order
Mil. a troop formation for drill or basic combat training, the intervals between the individuals being greater than those in close order. Also called extended order. [1615-25] * ...
open plan
—open-plan, adj. a floor plan without fully enclosed spaces for distinct rooms. Cf. closed plan. [1935-40] * * *
open policy
Insurance. a continuous policy covering goods of a class subject to changes in volume, usually requiring periodic reports of values. [1875-80] * * *
open position
1. Music. the arrangement of a chord with wide intervals between the parts. 2. (in ballet, modern dance, and jazz dance) any position in which the feet are separated. * * *
open primary
a direct primary election in which voters need not meet a test of party membership. [1930-35, Amer.] * * *
open prisons
➡ prisons * * *
open punctuation
open punctuation n. punctuation characterized by the use of relatively few commas or other marks: opposed to CLOSE PUNCTUATION * * *
open quote
1. the quotation mark used to begin a quotation (" or '). 2. (used by a speaker to signify that a quotation will follow). Also, open quotes. * * *
Open Range
▪ United States history       in U.S. history, the areas of public domain north of Texas where from about 1866 to 1890 more than 5,000,000 cattle were driven to fatten ...
open registry
—open-registry, adj. 1. ship registration under a national flag available to all ships regardless of nationality. 2. a national ship registry open to ships of all nations. * * *
open sandwich
a sandwich served on only one slice of bread, without a covering slice. [1945-50] * * *
open sea
the main body of a sea or ocean, esp. the part that is outside territorial waters and not enclosed, or partially enclosed, by land. * * *
open season
1. a specific season or time of year when it is legal to catch or hunt for fish or game protected at all other times by the law. 2. a period of time in which a person or thing is ...
open secret
something supposedly secret but actually known quite generally. [1875-80] * * *
open sentence
1. Math. an equation or inequality containing one or more variables in which its truth or falsehood depends upon the values assumed by the variables in a particular instance, as ...
open sesame
any marvelously effective means for bringing about a desired result: Wealth is the open sesame to happiness. [1785-95; from the use of these words by Ali Baba to open the door of ...
open shop
—open-shop, adj. a factory, office, or other business establishment in which a union, chosen by a majority of the employees, acts as representative of all the employees in ...
open sight
(on a firearm) a rear sight consisting of a notch across which the gunner aligns the front sight on the target. Cf. peep sight. [1585-95] * * *
open source
▪ social movement Introduction       social movement, begun by computer programmers, that rejects secrecy and centralized control of creative work in favour of ...
open space
Ecol. undeveloped land that is protected from development by legislation. [1820-30] * * *
open stage
▪ theatre also called  thrust stage , or  platform stage    theatrical stage without a proscenium, projecting into the audience and surrounded on three sides by the ...
open stance
Baseball. a batting stance in which the front foot is farther from the inside of the batter's box than the back foot. * * *
open stock
merchandise, esp. china, silverware, and glassware, sold in sets with additional individual pieces available from stock for future purchases, as for replacement. [1895-1900] * * *
open string
a staircase string whose top follows the profile of the steps in such a way that the treads project beyond its outer face. * * *
open system
Thermodynam. a region separated from its surroundings by a boundary that admits a transfer of matter or energy across it. Cf. closed system. [1935-40] * * *
open trailer
any dog that barks or bays on the trail of its quarry. Cf. still trailer. * * *

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