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Слова на букву oil-pius (15990)

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See ornery. * * *
—orneriness, n. /awr"neuh ree/, adj., ornerier, orneriest. Dial. 1. ugly and unpleasant in disposition or temper: No one can get along with my ornery cousin. 2. stubborn: I ...
Ornes, German Emilio
▪ 1999       Dominican journalist who served as publisher of the newspaper El Caribe and was a longtime campaigner for press freedom in Latin America (b. 1919?, Puerto ...
/awr"nis/, n., pl. ornithes /awr nuy"theez/. an avifauna. [1860-65; < G < Gk órnis bird; akin to OE earn eagle (see ERNE), G Aar] * * *
Ornish, Dean
▪ 1994       In an age when medical science was combating heart disease with costly high-tech interventions, American physician Dean Ornish was something of a throwback. ...
var. of ornitho- before a vowel: ornithoid. * * *
1. ornithological. 2. ornithology. * * *
/awr nith"ik/, adj. of or pertaining to birds. [1850-55; < Gk ornithikós birdlike, equiv. to ornith- ORNITH- + -ikos -IC] * * *
/awr"neuh theen'/, n. Biochem. an amino acid, H2N(CH2)3CH(NH2)COOH, obtained by the hydrolysis of arginine and occurring as an intermediate compound in the urea cycle of ...
/awr'neuh this"kee euhn/, n. 1. any herbivorous dinosaur of the order Ornithischia, having a pelvis resembling that of a bird. Cf. saurischian. adj. 2. belonging or pertaining to ...
a combining form meaning "bird," used in the formation of compound words: ornithology. Also, esp. before a vowel, ornith-. [comb. form repr. Gk ornith- (s. of órnis) bird] * * *
▪ plant genus  genus of plants in the family Hyacinthaceae, consisting of about 100 species of bulbous herbs, native to Eurasia and Africa. The leaves are grouped at the base ...
/awr"neuh thoyd'/, adj. resembling a bird. [1855-60, Amer.; ORNITH- + -OID] * * *
1. ornithological. 2. ornithology. * * *
▪ dinosaur genus       small, lightly built carnivorous dinosaur found as fossils from the Late Jurassic Period (146 million to 161 million years old) in North America. ...
See ornithology. * * *
See ornithologic. * * *
See ornithologic. * * *
See ornithologic. * * *
—ornithological /awr'neuh theuh loj"i keuhl/, ornithologic, adj. —ornithologically, adv. —ornithologist, n. /awr'neuh thol"euh jee/, n. the branch of zoology that deals ...
▪ dinosaur genus  ostrichlike dinosaurs (dinosaur) found as fossils in Mongolian, European, and North American deposits dating from 65 million to 125 million years ago (Early ...
/awr"neuh theuh pod', awr nuy"theuh-/, n. any herbivorous dinosaur of the suborder Ornithopoda whose members usually walked erect on their hind legs. [1885-90; < NL Ornithopoda ...
/awr'neuh thop"teuhr/, n. a heavier-than-air craft designed to be propelled through the air by flapping wings. [ < F ornithoptère (1908), equiv. to ornitho- ORNITHO- + -ptère < ...
/awr'neuh theuh ring"keuhs/, n. the platypus. [1790-1800; < NL: genus name, equiv. to ornitho- ORNITHO- + -rhynchus < Gk rhýnchos bill] * * *
/awr'neuh thoh"sis/, n. Vet. Pathol. psittacosis, esp. of birds other than those of the parrot family. [1830-40; < NL; see ORNITH-, -OSIS] * * *
/aw"rddaw/, n. Spanish. gold. * * * (as used in expressions) Cagayan de Oro Río de Oro Popular Front for the Liberation of Saguia el Hamra and Río de Oro * * *
oro y plata
/aw"rddaw ee plah"tah/; Eng. /awr"oh ee plah"teuh/, Spanish. gold and silver: motto of Montana. * * *
oro-1 a combining form meaning "mountain," used in the formation of compound words: orography. [ < Gk, comb. form of óros] oro-2 a combining form meaning "mouth," used in the ...
/awr'oh bang kay"sheuhs, or'-/, adj. belonging to the Orobanchaceae, the broomrape family of plants. Cf. broomrape family. [ < NL Orobanchace(ae) family name (L orobanch(e) ...
Orodes II
▪ king of Parthia died , 37/36 BC       king of Parthia (reigned c. 55/54–37/36 BC) who helped his brother Mithradates III murder their father, Phraates III, in about ...
/awr"euh jen', -jeuhn, ohr"-/, n. Geol. an extensive belt of rocks deformed by orogeny, associated in places with plutonic and metamorphic rocks. [ < G (1921); see ORO-1, -GEN] * ...
See orogeny. * * *
See orogenic. * * *
—orogenic /awr'euh jen"ik, or'euh-/, orogenetic, adj. /aw roj"euh nee, oh roj"-/, n. Geol. the process of mountain making or upheaval. Also called orogenesis /awr'euh jen"euh ...
See orography. * * *
orographic cloud
any cloud whose existence and form are largely controlled by the disturbed flow of air over and around mountains, as the banner cloud and crest cloud. [1975-80] * * *
orographic precipitation
precipitation caused by the lifting of moist air over a mountain barrier. [1965-70] * * * ▪ meteorology       rain, snow, or other precipitation produced when moist air ...
See orographic. * * *
See orographic. * * *
—orographic /awr'euh graf"ik, or'euh-/, orographical, adj. —orographically, adv. /aw rog"reuh fee, oh rog"-/, n. the branch of physical geography dealing with mountains. Also ...
/awr"oh uyd', ohr"-/, n. an alloy containing copper, tin, etc., used to imitate gold. Also, oreide. [1865-70, Amer.; < F or gold ( < L aurum) + -oide -OID] * * *
See orology. * * *
See orological. * * *
See orological. * * *
orology [ō räl′ə jē] n. 〚 ORO- + -LOGY〛 the study of mountains, esp. the study of how mountains are formed: cf. OROGRAPHY orological [ôr΄ō läj′i kəl] adj. * * ...
—orometric, adj. /aw rom"i teuhr, oh rom"-/, n. an aneroid barometer with a scale giving elevations above sea level, used to determine land-surface altitudes. [1875-80; ORO-1 + ...
/aw roh"moh/, n., pl. Oromos, (esp. collectively) Oromo for 1. 1. a member of a nomadic, pastoral people of Ethiopia and Kenya. 2. the Cushitic language of the Oromo. Also called ...
▪ Nigeria also called  Idua Oron        town, Akwa Ibom state, southeastern Nigeria. It lies at the mouth of the Cross River and is the terminus of roads from Uyo ...
—oronasally, adv. /awr'oh nay"zeuhl, ohr'oh-/, adj. 1. of or pertaining to the mouth and the nose. 2. Phonet. orinasal (def. 1). n. 3. Phonet. orinasal (def. 2). [1885-90; ...
/awr"euh noh', ohr"-/, n. a town in S Maine. 10,578. * * * ▪ Maine, United States       town, Penobscot county, east-central Maine, U.S. It lies along the Penobscot ...
/aw ron"teez, oh ron"-/, n. a river in W Asia, flowing N from Lebanon through NW Syria and then SW past Antioch, Turkey, to the Mediterranean. 250 mi. (405 km) long. * * *
Orontes River
River, Middle East. Rising in the Biqā Valley of Lebanon and flowing north between the Lebanon and Anti-Lebanon mountains, it passes the cities of Hims and Ḥamāh in Syria, ...
/awr'euh pen"dl euh, ohr'euh-/, n. any of several birds of the genus Gymnostinops, related to crows and feeding primarily on fruit and nectar, noted esp. for their hanging ...
See oropharynx. * * *
—oropharyngeal /awr'oh feuh rin"jee euhl, -far'in jee"euhl, ohr'-/, adj. /awr'oh far"ingks, ohr'-/, n., pl. oropharynges /-feuh rin"jeez/, oropharynxes. Anat. 1. the part of ...
▪ Philippines       city, northwestern Mindanao, Philippines. The city fronts on Iligan Bay (east) and the Bohol (Mindanao) Sea (northeast). It was a municipality until ...
/aw roh"zhee euhs/, n. Paulus /paw"leuhs/, fl. 5th century A.D., Spanish theologian and historian. * * *
Orosius, Paulus
▪ Christian historian flourished 414–417, probably Braga, Spain       defender of early Christian orthodoxy, theologian, and author of the first world history by a ...
—orotundity /awr'euh tun"di tee, ohr'-/, n. /awr"euh tund', ohr"-/, adj. 1. (of the voice or speech) characterized by strength, fullness, richness, and clearness. 2. (of a ...
See orotund. * * *
▪ California, United States       city, seat (1856) of Butte county, north-central California, U.S. It lies along the Feather River, in the Sacramento Valley, at the ...
Oroville Dam
▪ dam, California, United States  earth-fill dam on the Feather River, California, U.S. Completed by the state of California in 1968, it is the highest dam in the United ...
/aw rddaws"kaw/, n. José Clemente /haw se" kle men"te/, 1883-1949, Mexican painter. * * *
Orozco, José Clemente
born Nov. 23, 1883, Ciudad Guzmán, Mex. died Sept. 7, 1949, Mexico City Mexican mural painter. When he lost his left hand at 17, he abandoned architectural studies for ...
Orozco, JoséClemente
O·roz·co (ō-rōzʹkō, -rōsʹ-), José Clemente. 1883-1949. Mexican painter noted for his frescoes dealing with political and social themes. * * *
Orozco, Olga
▪ 2000       Argentine poet whose works, published in 18 volumes, were influenced by her life in the Pampas and reflected the sense of mystery she felt from that place's ...
/awr"peuhn/, n. Sir William Newenham Montague /nooh"euh neuhm, nyooh"-/, 1878-1931, Irish painter. * * *
Orpen, Sir William
▪ British painter in full  Sir William Newenham Montague Orpen   born November 27, 1878, Stillorgan, County Dublin, Ireland died September 29, 1931, London, ...
—orphanhood, n. /awr"feuhn/, n. 1. a child who has lost both parents through death, or, less commonly, one parent. 2. a young animal that has been deserted by or has lost its ...
orphan drug
Pharm. a drug that remains undeveloped or untested or is otherwise neglected because of limited potential for commercial gain. [1975-80] * * *
/awr"feuh nij/, n. 1. an institution for the housing and care of orphans. 2. the state of being an orphan; orphanhood. 3. Archaic. orphans collectively. [1530-40; ORPHAN + ...
See orphan. * * *
orphans' court
a probate court in certain U.S. states. [1705-15] * * *
See Orpheus. * * *
—Orphean /awr fee"euhn, awr"fee euhn/, adj. /awr"fee euhs, -fyoohs/, n. 1. Gk. Legend. a poet and musician, a son of Calliope, who followed his dead wife, Eurydice, to the ...
—Orphically, adv. /awr"fik/, adj. 1. of or pertaining to Orpheus. 2. resembling the music attributed to Orpheus; entrancing. 3. pertaining to a religious or philosophical ...
Orphic religion
      a Hellenistic mystery religion, thought to have been based on the teachings and songs of the legendary Greek musician Orpheus. No coherent description of such a ...
See Orphic. * * *
—Orphist, n., adj. /awr"fiz euhm/, n. 1. the religious or philosophical system of the Orphic school. 2. (often l.c.) Also called orphic cubism. Fine Arts. a short-lived but ...
See Orphism. * * *
—orphreyed, adj. /awr"free/, n., pl. orphreys. 1. an ornamental band or border, esp. on an ecclesiastical vestment. 2. gold embroidery. 3. rich embroidery of any sort. 4. a ...
/awr"peuh meuhnt/, n. a mineral, arsenic trisulfide, As2S3, found usually in soft, yellow, foliated masses, used as a pigment. [1350-1400; ME < OF < L auripigmentum pigment of ...
/awr"pin/, n. a plant, Sedum telephium, of the stonecrop family, having purplish flowers. Also, orpin. [1350-1400; ME < MF, back formation from orpiment ORPIMENT] * * *
/awr"ping teuhn/, n. one of a breed of large, white-skinned chickens. [1890-95; after Orpington, town in Kent, England] * * *
/awr/, n. 1. Sir John Boyd. See Boyd Orr, Sir John. 2. Robert Gordon (Bobby), born 1948, Canadian ice-hockey player. * * *
Orr, Bobby
in full Robert Gordon Orr born March 20, 1948, Parry Sound, Ont., Can. Canadian-born U.S. ice-hockey player. He was signed to a junior amateur contract by Boston Bruins scouts ...
Orr,Robert Gordon
Orr (ôr), Robert Gordon. Called “Bobby.” Born 1948. Canadian-born hockey player. He led the National Hockey League in scoring in 1970 and 1975 and was the first defenseman ...
/awr"euh, or"euh/, adj. Scot. not regular or scheduled; odd: orra work. Also, orrow. [1720-30; orig. uncert.] * * *
Orrefors glass
 fine 20th-century glass produced by a glasshouse at Orrefors in the south of Sweden. In 1916 and 1917 the Orrefors glasshouse hired the painters Simon Gate and Edvard Hald, ...
/awr"euh ree, or"-/, n., pl. orreries. 1. an apparatus for representing the positions, motions, and phases of the planets, satellites, etc., in the solar system. 2. any of ...
Orrery, Roger Boyle, 1st Earl of, Lord Boyle, Baron Of Broghill
▪ Irish author born April 25, 1621, Waterford, Ire. died Oct. 16, 1679, Castlemartyr, Ire.       Irish magnate and author prominent during the English Civil Wars, ...
/awr"in, or"-/, n. a male given name. * * *
orris1 /awr"is, or"-/, n. an iris, Iris germanica florentina, having a fragrant rootstock. Also, orrice. [1535-45; unexplained alter. of IRIS] orris2 /awr"is, or"-/, n. 1. a lace ...
orris oil
      yellowish, semisolid, fragrant essential oil obtained from the roots of the Florentine iris (Iris florentina) and used as a flavouring agent, in perfume, and ...
/awr"is rooht', -root', or"-/, n. the rootstock of the orris, used in perfumery, medicine, etc. [1590-1600; ORRIS1 + ROOT1] * * *
/awr"euh, or"euh/, adj. Scot. orra. * * *
Orry, Jean
▪ French economist born Sept. 4, 1652, Paris, Fr. died Sept. 29, 1719, Paris       French economist whose broad financial and governmental reforms in early 18th-century ...
Ors y Rovira, Eugenio d'
▪ Catalan author and philosopher born Sept. 28, 1882, Barcelona, Spain died Sept. 25, 1954, Villanueva y Geltrú       Catalan essayist, philosopher, and art critic who ...
Buttocks, backside. 1. Suffixed form *ors-o-. a. ass2, from Old English ærs, ears, backside; b. dodo, from Middle Dutch ærs, backside, tail. Both a and b from Germanic ...
Orsay Museum
▪ museum, Paris, France French  Musée d'Orsay   museum of Paris, France. It is housed in the former Orsay Railway Station (Gare d'Orsay), a large, ornate structure built ...
/awr sayl", -say", -sel"/, n. orchil. [ < F] * * *
/awrdd"sheuh/, n. a city in NE Byelorussia (Belarus), on the Dnieper River, NE of Minsk. 112,000. * * * ▪ Belarus also spelled  Orša,         city, Vitebsk oblast ...
Orsi, Paolo
▪ Italian archaeologist born Oct. 18, 1859, Rovereto, Austria died Nov. 9, 1935, Rovereto       archaeologist who pioneered in the excavation and research of sites, ...
Orsini Family
▪ Italian family       one of the oldest, most illustrious, and for centuries most powerful of the Roman princely families. Their origins, when stripped of legend, can ...
Orsini, Felice
▪ Italian revolutionary born Dec. 10, 1819, Meldola, Papal States [now in Italy] died March 13, 1858, Paris, France       Italian nationalist revolutionary and ...
Orsini, Marina
▪ 1994       Though she carefully guarded her private life from the public, Marina Orsini was distressed to find that in 1993 she was instantly recognizable on the ...
/awrddsk/, n. a city in the S Russian Federation in Europe, on the Ural River. 273,000. * * * ▪ Russia       city, Orenburg oblast (region), western Russia. It lies ...
/awr"seuhn/, n. a male given name: from an Old French word meaning "bearlike." * * *
Orson Welles
➡ Welles * * *
Orszag, Peter
▪ American economist in full  Peter Richard Orszag  born Dec. 16, 1968, Boston, Mass., U.S.    American economist who served as an economic adviser to U.S. Pres. Bill ...
/awrt/, n. Usually, orts. a scrap or morsel of food left at a meal. [1400-50; late ME; c. LG ort, early D oorete; cf. OE or- out-, aet food (see EAT)] * * *
Orta, Lake
▪ lake, Italy Italian  Lago D'orta,  also called  Lago Cusio,         lake in Novara and Verbano-Cusio-Ossola provincie, Piemonte (Piedmont) regione, northwestern ...
Ortega (Saavedra), (José) Daniel
born Nov. 11, 1945, La Libertad, Nic. President of Nicaragua (1984–90). In 1963 he became a member of the Sandinista National Liberation Front and organized urban resistance ...
Ortega Saavedra
/awrdd te"gah sah'ah ve"dhrddah/ (José) Daniel /haw se" dah nyel"/, born 1945, Nicaraguan political leader: president 1985-90. * * *
Ortega Spottorno, Jose
▪ 2003       Spanish journalist and publisher (b. Nov. 13, 1916, Madrid, Spain—d. Feb. 18, 2002, Madrid), founded Alianza Editorial (1966), Spain's major publisher of ...
Ortega y Gasset
/awr tay"geuh ee gah set"/; Sp. /awrdd te"gah ee gahs set"/ José /haw se"/, 1883-1955, Spanish philosopher, journalist, and critic. * * *
Ortega y Gasset, José
Ortega y Gas·set (ēgä-sĕtʹ), José. 1883-1955. Spanish philosopher. His most famous work, The Revolt of the Masses (1929), argues that humans are essentially unequal and ...
Ortega, Amancio
▪ 2009 Amancio Ortega Gaona  born March 28, 1936, Busdongo de Arbas, León, Spain       In 2008 fashion executive Amancio Ortega, the founding chairman of Spanish ...
Ortega, Daniel
▪ 2007  Daniel Ortega of the leftist Sandinista National Liberation Front (FSLN), who had served as Nicaragua's president from 1984 to 1990, was on Nov. 5, 2006, again elected ...
Ortega, Domingo
▪ Spanish bullfighter in full  Domingo López Ortega  born Feb. 25, 1906, Borox, Toledo, Spain died May 8, 1988, Madrid       Spanish matador noted for his daring and ...
Or·te·ga (ôr-tāʹgə, -tĕʹgä), Daniel. Born 1945. Nicaraguan revolutionary leader and politician. He helped establish the Government of National Reconstruction after the ...
/awrdd'te gahl"/, n. Cape, a cape in NW Spain, on the Bay of Biscay. * * *
Ortelius, Abraham
▪ Flemish cartographer (Latin), Flemish  Abraham Ortels , or  Wortels  born April 14, 1527, Antwerp [Belgium] died July 4, 1598, Antwerp       Flemish cartographer ...
Ortese, Anna Maria
▪ 1999       Italian writer of magic-realist fiction who was considered one of the 20th century's most important female Italian authors; Il cardillo addolorato (1993; ...
var. of ortho- before a vowel: orthicon. * * *
Orthodox. * * *
1. orthopedic 2. orthopedics. * * *
/awr"thi kon'/, n. Television. a camera tube, more sensitive than the iconoscope, in which a beam of low-velocity electrons scans a photoemissive mosaic. Also, orthiconoscope ...
/awr"thoh/, adj. Chem. pertaining to or occupying two adjacent positions in the benzene ring. Cf. meta2, para3. [1875-80; independent use of ORTHO-] * * *
1. a combining form occurring in loanwords from Greek, where it meant "straight," "upright," "right," "correct" (orthodox) and on this model used in the formation of compound ...
/awr'theuh kuz"euhn, awr"theuh kuz'-/, n. See parallel cousin. [1915-20] * * *
/awr'theuh duy klawr'euh ben"zeen, -ben zeen", -klohr'-/, n. Chem. a colorless liquid with a pleasant odor, C6H4Cl2, used as a solvent for a wide range of organic materials. Cf. ...
/awr'thoh nuy'treuh fee"nawl, -nol/, n. See under nitrophenol (def. 2). * * *
/awr'thoh noh"veuhm/, Pharm., Trademark. a brand name for a tablet containing the progestogen norethindrone and an estrogen, used as an oral contraceptive. * * *
/awr'thoh teuh looh"i deen', -din/, n. Chem. a light-yellow, very slightly water-soluble liquid, C7H9N, the ortho isomer of toluidine: used in the manufacture of dyes, saccharin, ...
/awr'thoh zuy"leen/, n. Chem. a clear, colorless, poisonous, flammable liquid, C8H10, the ortho isomer of xylene: used chiefly in the synthesis of phthalic anhydride. * * *
orthoboric acid
/awr"theuh bawr"ik, -bohr"-, awr'theuh-/, Chem. See boric acid (def. 1). Cf. ortho- (def. 2). [ORTHO- + BORIC ACID] * * *
/awr"theuh sen'teuhr/, n. Geom. the point of intersection of the three altitudes of a triangle. [1865-70; ORTHO- + CENTER] * * *
—orthocephaly, n. /awr'thoh seuh fal"ik/, adj. Cephalom. having a medium or intermediate relation between the height of the skull and the breadth or length. Also, ...
/awr'theuh kroh mat"ik, -thoh kreuh-/, adj. Photog. 1. representing correctly the relations of colors as found in a subject; isochromatic. 2. (of an emulsion) sensitive to all ...
See orthochromatic. * * *
/awr"theuh klays', -klayz'/, n. a common white or pink mineral of the feldspar group, KAlSi3O8, having two good cleavages at right angles, and found in silica-rich igneous rocks: ...
/awr'theuh klas"tik/, adj. Crystall. (of a crystal) having cleavages at right angles to each other. [1875-80; < G orthoklastisch, equiv. to ortho- ORTHO- + -klastisch CLASTIC] * ...
/awr'theuh don"sheuh, -shee euh/, n. Dentistry. 1. orthodontics. 2. treatment for the correction of irregularly aligned teeth, usually involving braces and sometimes oral ...
See orthodontics. * * *
See orthodontic. * * *
—orthodontic, orthodontal, adj. —orthodontist, n. /awr'theuh don"tiks/, n. (used with a sing. v.) the branch of dentistry dealing with the prevention and correction of ...
See orthodontic. * * *
/awr"theuh don'cheuhr/, n. orthodontia (def. 2). [1965-70; appar. b. ORTHODONTIA and DENTURE, prob. orig. (or exclusively) in r-less accents, in which both words end in /euh/] * ...
—orthodoxly, adv. —orthodoxness, n. /awr"theuh doks'/, adj. 1. of, pertaining to, or conforming to the approved form of any doctrine, philosophy, ideology, etc. 2. of, ...
Orthodox Church
1. the Christian church comprising the local and national Eastern churches that are in communion with the ecumenical patriarch of Constantinople; Byzantine Church. 2. ...
Orthodox Church in America
formerly  Russian Orthodox Greek Catholic Church of America        ecclesiastically independent, or autocephalous, church of the Eastern Orthodox communion, recognized ...
Orthodox Church of Czechoslovakia
      autocephalous, or ecclesiastically independent, member of the Eastern Orthodox communion, created in 1951 by the patriarchate of Moscow.       There was no ...
Orthodox Church of Finland
      Eastern Orthodox church, recognized as the second state church of Finland. Most of the Orthodox Finns were originally from Karelia, the southeastern part of Finland ...
Orthodox Church of Poland
▪ Eastern Orthodoxy in full  Autocephalous Orthodox Church Of Poland,         ecclesiastically independent member of the Eastern Orthodox communion, established in ...
Orthodox Eastern Church
Orthodox Eastern Church n. EASTERN ORTHODOX CHURCH * * *
Orthodox Jew
a Jew who adheres faithfully to the principles and practices of traditional Judaism as evidenced chiefly by a devotion to and study of the Torah, daily synagogue attendance if ...
Orthodox Jewish Congregations of America, Union of
▪ North American religious federation       official federation of Jewish Orthodox synagogues in the United States and Canada; its counterpart organization for rabbis is ...
Orthodox Judaism
Judaism as observed by Orthodox Jews. * * * Religion of Jews who adhere strictly to traditional beliefs and practices; the official form of Judaism in Israel. Orthodox Jews ...
orthodox sleep
Physiol. dreamless sleep, characterized by a slow alpha rhythm of brain waves and no marked physiological changes. [1965-70] * * *
Orthodox Church n. The Eastern Orthodox Church. * * *
Orthodox Judaism n. The branch of Judaism that is governed by adherence to the Torah as interpreted in the Talmud. * * *
See orthodox. * * *
orthodox sleep n. Sleep characterized by a slow alpha rhythm and the absence of REM. * * *
/awr"theuh dok'see/, n., pl. orthodoxies for 1. 1. orthodox belief or practice. 2. orthodox character. [1620-30; < LL orthodoxia < Gk orthodoxía right opinion, equiv. to ...
Orthodoxy Sunday.
See under Feast of Orthodoxy. [1840-50] * * *
Orthodoxy, Autocracy, and Nationality
▪ Russian slogan Russian  Pravoslaviye, Samoderzhaviye, I Narodnost,         in Russian history, slogan created in 1832 by Count Sergey S. Uvarov (Uvarov, Sergey ...
Orthodoxy, Feast of
▪ Eastern Orthodoxy       feast celebrated on the first Sunday of Lent by the Eastern Orthodox Church and Eastern Catholics of the Byzantine Rite to commemorate the ...
See orthoepy. * * *
See orthoepic. * * *
or·tho·e·pist (ôr-thōʹə-pĭst, ôrʹthō-ĕp'ĭst) n. A specialist in orthoepy, especially one of a number of 16th- and 17th-century scholars who proposed reforms of ...
—orthoepic /awr'thoh ep"ik/, orthoepical, adj. —orthoepist, n. —orthoepistic, adj. /awr thoh"euh pee, awr"thoh ep'ee/, n. the study of correct pronunciation. Also, ...
/awr'theuh fawr"mayt/, n. Chem. an ester of orthoformic acid. [ORTHO- + FORMATE] * * *
orthoformic acid
/awr"theuh fawr"mik, awr'theuh-/, Chem. a hypothetical acid, HC(OH)3, known only in the form of its esters. [ORTHO- + FORMIC ACID] * * *
/awr'theuh jen"euh sis/, n. 1. Biol. a. Also called orthoselection. evolution of a species proceeding by continuous structural changes in a single lineage without presenting a ...
/awr'thoh jeuh net"ik/, adj. pertaining to or exhibiting orthogenesis. [1895-1900; < NL orthogenet- (s. of orthogenesis) ORTHOGENESIS + -IC] * * *
See orthogenetic. * * *
/awr'theuh jen"ik/, adj. 1. Psychol. of, concerned with, or providing corrective treatment for mentally retarded or seriously disturbed children: orthogenic class. 2. ...
orthognathic surgery
the surgical correction of deformities or malpositions of the jaw. [ORTHOGNATH(OUS) + -IC] * * *
—orthognathism /awr thog"neuh thiz'euhm/, orthognathy, n. /awr thog"neuh theuhs/, adj. Craniom. straight-jawed; having the profile of the face vertical or nearly so; having a ...
—orthogonality, n. —orthogonally, adv. /awr thog"euh nl/, adj. 1. Math. a. Also, orthographic. pertaining to or involving right angles or perpendiculars: an orthogonal ...
orthogonal polynomials
A system of polynomials that are mutually orthogonal (orthogonality is the higher-dimensional analog of perpendicularity), useful in solving differential equations arising in ...
orthogonal trajectory
Math. the locus of a point whose path cuts each curve of a family of curves at right angles. [1810-20] * * * ▪ mathematics  family of curves that intersect another family of ...
See orthogonal. * * * In mathematics, a property synonymous with perpendicularity when applied to vectors but applicable more generally to functions. Two elements of an inner ...
—orthogonalization, n. /awr thog"euh nl uyz'/, v.t., orthogonalized, orthogonalizing. Math. to make (vectors, functions, etc.) orthogonal. Also, esp. Brit., ...
See orthogonality. * * *
orthogonal projection n. The two-dimensional graphic representation of an object formed by the perpendicular intersections of lines drawn from points on the object to a plane of ...
orthograde [ôr′thō grād΄] adj. 〚 ORTHO- + -GRADE〛 Zool. walking with the body upright * * *
/awr thog"reuh feuhr/, n. 1. a person versed in orthography or spelling. 2. a person who spells correctly. Also, orthographist. [1590-1600; < LL orthograph(us) (adj. and n.) (L ...
—orthographically, adv. /awr'theuh graf"ik/, adj. 1. of or pertaining to orthography. 2. orthogonal (def. 1a). Also, orthographical. [1660-70; ORTHOGRAPH(Y) + -IC] * * *
orthographic projection
a two-dimensional graphic representation of an object in which the projecting lines are at right angles to the plane of the projection. Also called orthogonal projection. Cf. ...
See orthographic. * * *
orthographic projection n. See orthogonal projection. * * *
See orthographer. * * *
/awr thog"reuh fuyz'/, v., orthographized, orthographizing. v.t. 1. to spell correctly or according to the rules of orthography. v.i. 2. to apply the rules of correct ...
/awr thog"reuh fee/, n., pl. orthographies for 3-5. 1. the art of writing words with the proper letters, according to accepted usage; correct spelling. 2. the part of language ...
/awr'theuh huy"dreuh jeuhn/, n. Physics, Chem. the form of molecular hydrogen in which the nuclei of the two hydrogen atoms contained in the molecule have spins in the same ...
/awr'thoh ker'euh tol"euh jee/, n. Ophthalm. a technique for correcting refractive errors in vision by changing the shape of the cornea with the temporary use of progressively ...
/awr'thoh meuh lek"yeuh leuhr/, adj. being or pertaining to the treatment of disease by increasing, decreasing, or otherwise controlling the intake of natural substances, esp. ...
orthomorphic projection
/awr"theuh mawr"fik, awr'-/, Cartog. See conformal projection. [1880-85; ORTHO- + -MORPHIC] * * *
orthomyxovirus [ôr΄thō mik΄sə vī′rəs] n. any of a family (Orthomyxoviridae) of RNA viruses affecting certain vertebrates, primarily causing upper respiratory infections; ...
      any of a class (Orthonectida) of rare wormlike parasites of various marine invertebrates, including bivalved mollusks and polychaete annelids; they are usually ...
/awr'theuh nawr"meuhl/, adj. Math. 1. (of a system of functions) normal; normalized. 2. (of a set of vectors) having the properties that any two vectors are perpendicular and ...
—orthopedically, adv. /awr'theuh pee"dik/, adj. of or pertaining to orthopedics. Also, orthopaedic. [1830-40; ORTHO- + Gk paid- (s. of paîs) child + -IC] * * *
See orthopedic. * * *
—orthopedist, n. /awr'theuh pee"diks/, n. (used with a sing. v.) the medical specialty concerned with correction of deformities or functional impairments of the skeletal ...
See orthopedic. * * *
/awr'theuh fos"fayt/, n. Chem. a salt or ester of orthophosphoric acid, or any compound containing the trivalent group -PO4. [1855-60; ORTHO- + PHOSPHATE] * * *
orthophosphoric acid
/awr"thoh fos fawr"ik, -for"-, awr'-/, Chem. a colorless, crystalline solid, H3PO4, the tribasic acid of pentavalent phosphorus: used chiefly in fertilizers, as a source of ...
orthophosphorous acid
/awr"theuh fos"feuhr euhs, awr'thoh fos fawr"euhs, -fohr"-/, Chem. a white to yellowish, crystalline, hygroscopic, water-soluble solid, H3PO3, used chiefly in the synthesis of ...
orthophthalic acid
/awr'theuh thal"ik, -theuhf thal"-/. Chem. See under phthalic acid (def. 1). [ORTHO- + PHTHALIC ACID] * * *
/awr'theuh fuy"rik/, adj. Petrog. of or pertaining to a texture in which the groundmass is characterized by closely packed, short, quadrilateral crystals of feldspar larger than ...
—orthopneic, orthopnoeic, adj. /awr thop"nee euh, awr'thop nee"euh, -theuhp-/, n. Path. difficult or painful breathing except in an erect sitting or standing position. Also, ...
/awr"theuh pod'/, n. Slang. an orthopedist. [1955-60; by shortening and alter.; see -POD] * * *
/awr'theuh prak"see euh/, n. Med. the correction of deformities; orthopedics. Also, orthopraxy. [1850-55; ORTHO- + Gk prâx(is) PRAXIS + -IA] * * *
/awr"theuh prak'see/, n. 1. correctness or orthodoxy of action or practice. 2. Med. orthopraxia. [1850-55; ORTHO- + PRAX(IS) + -Y3] * * *
See orthopsychiatry. * * *
See orthopsychiatric. * * *
See orthopsychiatric. * * *
—orthopsychiatric /awr'thoh suy'kee a"trik/, orthopsychiatrical, adj. —orthopsychiatrist, n. /awr'thoh si kuy"euh tree, -suy-/, n. an approach to psychiatry concerned with ...
orthopter [ôr thäp′tər] n. ORNITHOPTER * * *
See orthopterous. * * *
/awr thop"teuhr euhn/, adj. 1. orthopterous. n. 2. an orthopterous insect. [1895-1900; < NL Orthopter(a) (see ORTHOPTERON) + -AN] * * * ▪ insect Introduction   broadly, any ...
/awr thop"teuh ron', -teuhr euhn/, n., pl. orthoptera /-teuhr euh/. an orthopterous insect. [1875-80; < NL, sing. of Orthoptera name of the order. See ORTHOPTEROUS] * * *
/awr thop"teuhr euhs/, adj. belonging or pertaining to the Orthoptera, an order of insects, including the cockroaches, mantids, walking sticks, crickets, grasshoppers, and ...
/awr thop"tik/, adj. Ophthalm. pertaining to or producing normal binocular vision. [1880-85; ORTH- + OPTIC] * * *
/awr thop"tiks/, n. (used with a sing. v.) a method of exercising the eye and its muscles in order to cure strabismus or improve vision. [see ORTHOPTIC, -ICS] * * *
See orthoptic. * * *
▪ mineral  any of a series of common silicate minerals in the pyroxene family. Orthopyroxenes typically occur as fibrous or lamellar (thin-plated) green masses in igneous and ...
orthopyroxene granite
      member of the charnockite (q.v.) series of metamorphic rocks. * * *
/awr'theuh rom"bik/, adj. Crystall. noting or pertaining to a system of crystallization characterized by three unequal axes intersecting at right angles; rhombic; trimetric. Cf. ...
orthorhombic system
▪ crystallography       one of the structural categories systems to which crystalline solids can be assigned. Crystals in this system are referred to three mutually ...
/awr"theuh skohp'/, n. Ophthalm. (formerly) an instrument for examining the internal structures of the eye through a layer of water that neutralizes the refraction of the ...
/awr'theuh skop"ik/, adj. Ophthalm. pertaining to, characterized by, or produced by normal vision. [1850-55; ORTHO- + -SCOPE + -IC] * * *
/awr'thoh si lek"sheuhn/, n. Biol. orthogenesis (def. 1a). [ORTHO- + SELECTION] * * *
/awr thoh"sis/, n., pl. orthoses /-seez/. 1. Med. the correction of orthopedic maladjustments. 2. an orthotic. [1955-60; < Gk órthosis a making straight, guidance, equiv. to ...
/awr"theuh stat'/, n. (in a classical temple) any of a number of large stone slabs revetting the lower part of the cella. [1905-10; < Gk orthostátes, equiv. to ortho- ORTHO- + ...
/awr thos"teuh teez'/, n., pl. orthostatai /-tuy'/. orthostat. * * *
/awr'theuh stat"ik/, adj. relating to or caused by erect posture. [1900-05; ORTHO- + STATIC] * * *
orthostatic hypotension
Med. a fall in blood pressure associated with an upright position, usually occurring as a result of standing still for a long time or rising from a prolonged stay in bed and ...
—orthostichous, adj. /awr thos"ti kee/, n., pl. orthostichies. Bot. 1. a vertical rank or row. 2. an arrangement of members, as leaves, at different heights on an axis so that ...
/awr"theuh stuyl'/, adj. Archit. 1. (of columns) erected in a straight row. 2. having columns in a straight row or in straight rows. [1825-35; ORTHO- + -STYLE2] * * *
/awr thot"ik/, n. 1. Also, orthosis. a device or support, esp. for the foot, used to relieve or correct an orthopedic problem. adj. 2. of or pertaining to orthotics. [1960-65; ...
—orthotist /awr thot"ist, awr"theuh tist/, n. /awr thot"iks/, n. (used with a singular v.)a branch of medicine dealing with the making and fitting of orthotic ...
See orthotic. * * *
/awr'theuh trop"ik, -troh"pik/, adj. Bot. noting, pertaining to, or exhibiting a mode of vertical growth. [1885-90; ORTHO- + -TROPIC] * * *
See orthotropic. * * *
/awr tho"treuh piz'euhm/, n. Bot. orthotropic tendency or growth. [1880-85; ORTHO- + -TROPISM] * * *
/awr tho"treuh peuhs/, adj. Bot. (of an ovule) straight and symmetrical, with the chalaza at the evident base and the micropyle at the opposite extremity. [1820-30; < NL ...
/awrdd"thrddaws/; Eng. /awr"thros/, n. Gk. Orth. Ch. the morning office, corresponding to matins. [ < LGk, Gk órthros dawn] * * *
Ortigão, José Duarte Ramalho
▪ Portuguese journalist born Nov. 24, 1836, Porto, Port. died Sept. 27, 1915, Lisbon       Portuguese essayist and journalist known for his mastery of Portuguese prose ...
Ortiz Mena, Antonio
▪ 2008       Mexican politician born April 16, 1907 , Parral, Chihuahua, Mex. died March 12, 2007 , Mexico City, Mex. was credited with fueling Mexico's phenomenal ...
Ortiz, Fernando
▪ Cuban anthropologist born July 16, 1881, Havana, Cuba died April 10, 1969, Havana       anthropologist, essayist, and philologist who pioneered in the study of ...
/awrt"leuhr/, n. 1. a range of the Alps in N Italy. 2. the highest peak of this range. 12,802 ft. (3902 m). * * *
Ortles [ō̂rt′lərō̂rt′lās] range of the E Alps, in N Italy: highest peak (Ortles), 12,792 ft (3,899 m): Ger. name Ortler [ō̂rt′lər] * * * Ort·les (ôrtʹlās) ...
/awr"tl euhn/, n. 1. an Old World bunting, Emberiza hortulana, esteemed as a table delicacy. 2. the bobolink. [1520-30; < F < Pr: lit., gardener (i.e., frequenting gardens) < L ...
Ortoli, Francois-Xavier
▪ 2008       French politician born Feb. 16, 1925, Ajaccio, Corsica died Nov. 30, 2007 was president (1973–77) of the European Commission (EC; part of what later ...
(1933–67) an English writer of plays that are full of wild and often shocking humour, including Entertaining Mr Sloane (1964), Loot (1965) and What the Butler Saw (1967). He ...
Orton, Joe
orig. John Kingsley Orton born Jan. 1, 1933, Leicester, Leicestershire, Eng. died Aug. 9, 1967, London British dramatist. Originally an unsuccessful actor, he turned to ...
Or·ton (ôrʹtn), Joe. Full name John Kingsley Orton. 1933-1967. British playwright noted for his black comedies, including Entertaining Mr. Sloane (1964) and What the Butler ...
▪ Italy formerly  Ortona a Mare        town, Abruzzi region, central Italy, on a promontory 230 feet (70 m) above sea level, on the Adriatic coast, about 11 miles ...
▪ Iran also spelled  Urmia, or Urūmiyeh,  formerly  Reẕāʾīyeh, or Riẕāiyeh,         city, extreme northwestern Iran. It lies just west of Lake Urmia on a ...
/aw rddooh"rddaw/, n. a city in W Bolivia: a former capital. 145,410; over 12,000 ft. (3660 m) high. * * * ▪ Bolivia  city, west-central Bolivia. It lies at 12,150 feet ...
Old Russian. * * *
off-road vehicle. * * *

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