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Owain Gwynedd ... Oyrat
Owain Gwynedd
last great king of North Wales (Gwynedd) who helped advance Welsh independence against Norman and English dominance.
Owambo
geographic region, northern Namibia. Owambo is bordered by the Kaokoland (Kaokoveld) region on the west and by the Kavango region on the east. The border with Angola lies to the ...
Owatonna
city, seat (1856) of Steele county, southern Minnesota, U.S. It lies astride the Straight River, known to the Sioux as Owatonna (meaning "straight"), about 65 miles (105 km) south of ...
Owen Falls
waterfall on the Victoria Nile at Jinja, Uganda, below the river's outlet from Lake Victoria. The falls are the site of Owen Falls Dam, 2,726 feet (831 m) long and ...
Owen Stanley Range
segment of the central highlands of New Guinea, occupying the southeastern "tail" of the island. The range rises abruptly from the coastal plain to a height of 9,000 feet (2,750 ...
Owen, Alun
Welsh dramatist for radio, television, screen, and stage whose work often reflects the cultural and religious conflicts of the city where he was born.
Owen, Daniel
writer, considered the national novelist of Wales. He was a natural storyteller whose works, set in his own time, introduced a wealth of vivid and memorable characters that have given ...
Owen, Goronwy
clergyman and poet who revived the bardic tradition in 18th-century Welsh literature. He breathed new life into two moribund bardic meters, cywydd and the awdl, using them as vehicles for ...
Owen, John
Welsh epigrammatist whose perfect mastery of the Latin language brought him the name of "the British Martial," after the ancient Roman poet.
Owen, John
English Puritan minister, prolific writer, and controversialist. He was an advocate of Congregationalism and an aide to Oliver Cromwell, the lord protector of England (1653-58).
Owen, Robert
Welsh manufacturer turned reformer, one of the most influential early 19th-century advocates of utopian socialism. His New Lanark mills in Lanarkshire, Scotland, with their social and industrial welfare programs, became ...
Owen, Robert Dale
American social reformer and politician. The son of the English reformer Robert Owen, Robert Dale Owen was steeped in his father's socialist philosophy while growing up at New Lanark in ...
Owen, Sir Richard
British anatomist and paleontologist who is remembered for his contributions to the study of fossil animals, especially dinosaurs. He was the first to recognize them as different from today's reptiles ...
Owen, Wilfred
English poet noted for his anger at the cruelty and waste of war and his pity for its victims. He also is significant for his technical experiments in assonance, which ...
Owendo
deepwater port, northwestern Gabon, on the north shore of the Gabon Estuary; it serves the national capital, Libreville (9 miles [15 km] north-northwest), and was designed to handle ore vessels. ...
Owens River
river, eastern California, U.S. Located in Mono and Inyo counties, it rises in the Sierra Nevada southeast of Yosemite National Park and flows about 120 miles (200 km) generally west-southwest ...
Owens, Jesse
American track-and-field athlete, who set a world record in the running broad jump (also called long jump) that stood for 25 years and who won four gold medals at the ...
Owensboro
city, seat (1815) of Daviess county, on the Ohio River in western Kentucky, U.S., 32 miles (51 km) southeast of Evansville, Indiana. Founded about 1800, it was known to early ...
Owerri
town, capital of Imo state, southern Nigeria, at the intersection of roads from Aba, Onitsha, Port Harcourt, and Umuahia. It is the chief trade centre (yams, cassava [manioc], taro, corn ...
owl
any member of a homogeneous order of primarily nocturnal raptors found nearly worldwide.
owl parrot
New Zealand parrot species of the subfamily Strigopinae. See parrot.
owl-faced monkey
arboreal guenon found in tropical forests east of the Congo basin. The owl-faced monkey is greenish gray with black underparts and forelimbs; the lower back and base of the tail ...
owl-fly
large neuropteran fly of the family Ascalaphidae, having membranous wings and long, clubbed antennae. The larva camouflages itself with debris or hides beneath bark to await prey. The adults are ...
owlet
commonly, any young owl; the term is also used as the general name for several diminutive African and Southeast Asian species of Glaucidium (see pygmy owl) and two little owls ...
owlet frogmouth
any of seven or eight species of shy and solitary night birds belonging to the genus Aegotheles and comprising the family Aegothelidae. They are closely related to frogmouths, in the ...
owlet moth
any of the more than 20,000 species in the cosmopolitan insect family Noctuidae (order Lepidoptera), having powdery, dusky wings. This large group is divided by some authorities into many families.
ownership
the legal relation between a person (individual, group, corporation, or government) and an object. The object may be corporeal, such as furniture, or completely the creature of law, such as ...
Owo
town, Ondo state, southwestern Nigeria, at the southern edge of the Yoruba Hills (elevation 1,130 feet [344 m]) and at the intersection of roads from Akure, Kabba, Benin City, and ...
Owyhee River
river formed by the junction of several forks in the southwestern corner of Idaho, U.S. It flows northwest across the Oregon boundary and north through Malheur county and empties into ...
ox
(Bos taurus, or B. taurus primigenius), a domesticated form of the large horned mammals that once moved in herds across North America and Europe (whence they have disappeared) and Asia ...
oxalic acid
a colourless, crystalline, toxic organic compound belonging to the family of carboxylic acids. Oxalic acid is widely used as an acid rinse in laundries, where it is effective in removing ...
Oxalis
genus of small herbaceous plants, in the family Oxalidaceae, comprising about 850 species, native primarily to southern Africa and tropical and South America. A few South American species have edible ...
oxbird
any of certain small sandpipers, especially the dunlin (q.v.). In Africa the buffalo weaver (q.v.) and the oxpecker are called oxbirds.
oxbow lake
small lake located in an abandoned meander loop of a river channel. It is generally formed as a river cuts through a meander neck to shorten its course, causes the ...
Oxenstierna, Axel, Greve
chancellor of Sweden (1612-54), successively under King Gustav II Adolf and Queen Christina. He was noted for his administrative reforms and for his diplomacy and military command during the Thirty ...
Oxenstierna, Bengt Gabrielsson, Greve
Swedish statesman who, as the principal foreign policy adviser of King Charles XI, established a virtually neutral foreign policy for Sweden, breaking the existing alliance with France and forming ties ...
oxeye
in Britain, any of certain small sandpipers (especially the dunlin; q.v.) and the great tit (titmouse). See also tit.
Oxfam International
privately funded, international organization that provides relief and development aid to impoverished or disaster-stricken communities worldwide. The original Oxfam was founded at Oxford, England, in 1942 to raise funds for ...
Oxford
city (district), administrative and historic county of Oxfordshire, England, best known for the University of Oxford, which is located within it.
Oxford
city, seat (1837) of Lafayette county, northern Mississippi, U.S. It is situated about 75 miles (120 km) southeast of Memphis, Tennessee. Originating as a trading post, it was incorporated in ...
Oxford
county, western Maine, U.S. It consists of a mountainous region bordered to the west by New Hampshire and to the north by Quebec, Canada. The Appalachian National Scenic Trail crosses ...
Oxford English Dictionary, The
definitive historical dictionary of the English language, originally consisting of 12 volumes and a 1-volume supplement. The dictionary is a corrected and updated revision of A New English Dictionary on ...
Oxford movement
19th-century movement centred at the University of Oxford that sought a renewal of "catholic," or Roman Catholic, thought and practice within the Church of England in opposition to the Protestant ...
Oxford, Edward de Vere, 17th Earl of
English lyric poet and patron of an acting company, Oxford's Men, who became, in the 20th century, the strongest candidate proposed (next to William Shakespeare himself) for the authorship of ...
Oxford, John de Vere, 13th Earl of
English soldier and royal official, a Lancastrian leader in the Wars of the Roses. He helped to restore the deposed King Henry VI (1470) and later (1485) to secure the ...
Oxford, Provisions of
(1258), in English history, a plan of reform accepted by Henry III, in return for the promise of financial aid from his barons. It can be regarded as England's first ...
Oxford, Robert de Vere, 9th earl of
favourite of King Richard II of England (ruled 1377-99) during that monarch's minority. He led the group of courtiers who unsuccessfully supported Richard's efforts in 1385-87 to wrest control of ...
Oxford, Robert Harley, 1st Earl of, Earl Mortimer, Baron Harley Of Wigmore
British statesman who headed the Tory ministry from 1710 to 1714. Although by birth and education he was a Whig and a Dissenter, he gradually over the years changed his ...
Oxford, University of
English autonomous institution of higher learning at Oxford, Oxfordshire, England, one of the world's great universities. It lies along the Upper River Thames (called by Oxonians the Isis), 50 miles ...
Oxfordshire
administrative and historic county of south-central England, bounded on the north by Warwickshire and Northamptonshire, on the west by Gloucestershire, on the south by Berkshire, and on the east by ...
oxidation number
the total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom.
oxidation-reduction reaction
any chemical reaction in which the oxidation number of a participating chemical species changes. The term covers a large and diverse body of processes. Many oxidation-reduction reactions are as common ...
oxide
any of a large and important class of chemical compounds in which oxygen is combined with another element.
oxide mineral
any naturally occurring inorganic compound with a structure based on close-packed oxygen atoms in which smaller, positively charged metal or other ions occur in ...
oxidoreductase
any member of a class of enzymes, commonly known as dehydrogenases or oxidases, that catalyze the removal of hydrogen atoms and electrons from the compounds on which they act. Substances ...
oxime
any of a class of nitrogen-containing organic compounds usually prepared from hydroxylamine and an aldehyde, a ketone, or a quinone. Oximes have the structure X\Y/C&doublehorzbond; N&singlehorzbond;OH, in which X and ...
Oxisol
one of the 12 soil orders in the U.S. Soil Taxonomy. Oxisols form principally in humid tropical zones under rainforest, scrub and thorn forest, or savanna vegetation on flat to ...
Oxley, John
surveyor-general and explorer who played an important part in the exploration of eastern Australia and also helped open up Van Diemen's Land (later Tasmania).
Oxnard
city, Ventura county, southwestern California, U.S. It lies near the Pacific coast, between Los Angeles and Santa Barbara. Originally inhabited by Chumash Indians, the city was founded in 1898 near ...
oxpecker
either of the two species of the African genus Buphagus, of the family Sturnidae (order Passeriformes). Both species-the yellow-billed (B. africanus) and the red-billed (B. erythrorhynchus)-are brown birds 20 cm ...
oxygen
nonmetallic chemical element of Group VIa of the periodic table. Oxygen is a colourless, odourless, tasteless gas, the most plentiful element in the Earth's crust; its most important compound is ...
oxygen cycle
circulation of oxygen in various forms through nature. Free in the air and dissolved in water, oxygen is second only to nitrogen in abundance among uncombined elements in the atmosphere. ...
oxygen group element
any of the five chemical elements comprising Group VIa of the periodic classification-namely, oxygen, sulfur, selenium, tellurium, and polonium. (See .) A relationship among the first three members of the ...
Oxyrhynchus
ancient capital of the 19th Upper Egyptian nome (province), on the western edge of the Nile Valley, in al-Minya muhafazah (governorate). It is best known for the numerous papyri uncovered ...
oxytocin
hormone used clinically to help begin or to continue labour, to control bleeding following delivery, and to stimulate the secretion of breast milk. Oxytocin was first synthesized (along with the ...
Oya Current
surface oceanic current flowing southwest along the Kamchatka Peninsula and the Kuril Islands. Meeting the Kuro Current Extension east of Japan, part of the cold, less saline water of the ...
Oyama
city, Tochigi ken (prefecture), Honshu, Japan, on the Omoi River. A castle town in early times, it became a post station and river port during the Tokugawa period (1603-1867). The ...
Oyapock River
river that forms the border between French Guiana and the Brazilian state of Amapa. It rises in the Tumuc-Humac Mountains and flows northeast for 311 miles (500 km) to empty ...
Oyem
town, northern Gabon. It lies on a plateau at an elevation of about 3,000 feet (900 m). Oyem is an administrative and transport centre for an agricultural area. Cocoa and ...
Oyo
town, Oyo state, southwestern Nigeria. Oyo lies 32 miles (51 km) north of Ibadan. In the 1830s it was declared the new seat of the alafin of Oyo (the political ...
Oyo
state, western Nigeria. Oyo was reduced in size when Osun state was created out of its eastern portion in 1991. Oyo is bounded by the states of Kwara on the ...
Oyo empire
Yoruba state north of Lagos, in present-day southwestern Nigeria, that dominated, during its apogee (1650-1750), most of the states between the Volta River in the west and the Niger River ...
Oyomeigaku
one of the three major schools of Neo-Confucianism that developed in Japan during the Tokugawa period (1603-1867). See Neo-Confucianism.
Oyono, Ferdinand Leopold
African statesman, actor, and comic writer whose two best-known works-Une Vie de boy (1956; Houseboy) and Le Vieux Negre et la medaille (1956; The Old Man and the Medal), written ...
Oyono-Mbia, Guillaume
African dramatist and short-story writer, one of bilingual Cameroon's few writers to achieve success both in French and in English. Oyono-Mbia attended the College Evangelique at Limbamba and then went ...
Oyrat
any of the peoples speaking western dialects of the Mongol language group.