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Omaha Beach ... Ontario
Omaha Beach
second beach from the west among the five landing areas of the Normandy Invasion of World War II. It was assaulted on June 6, 1944 (D-Day of the invasion), by ...
Omalius d'Halloy, Jean-Baptiste-Julien d'
Belgian geologist who was an early proponent of evolution.
Oman
country occupying the southeastern coast of the Arabian Peninsula. It is bounded to the southwest by Yemen, to the south and east by the Arabian Sea, to the north by ...
Oman, Gulf of
northwest arm of the Arabian Sea, between the eastern portion (Oman) of the Arabian Peninsula to the southwest and Iran to the north. The gulf is 200 miles (320 km) ...
Oman, John Wood
British Presbyterian theologian.
Omar Khayyam
Persian mathematician, astronomer, and poet, renowned in his own country and time for his scientific achievements but chiefly known to English-speaking readers through the translation of a collection of his ...
ombre
Anglicized version of the classic Spanish card game originally called hombre (meaning "man") and now known as tresillo in Spain and South America.
ombres chinoises
(French: "Chinese shadows"), European version of the Chinese shadow-puppet show, introduced in Europe in the mid-18th century by returning travelers. Soon adopted by French and English showmen, the form gained ...
ombudsman
legislative commissioner for investigating citizens' complaints of bureaucratic abuse. The office originated in Sweden in 1809-10 and has been copied in various forms in Scandinavia, New Zealand, the United Kingdom, ...
Omdurman
one of the Three Towns (with Khartoum and Khartoum North), east-central Sudan. Situated on the left bank of the main Nile River just below the confluence of the Blue and ...
Omdurman, Battle of
(Sept. 2, 1898), decisive military engagement in which Anglo-Egyptian forces, under Major General Sir Herbert Kitchener (later Lord Kitchener), defeated the forces of the Mahdist leader 'Abd Allah and thereby ...
Omega Centauri
(catalog number NGC 5139), the brightest globular star cluster. It is located in the southern constellation Centaurus. It has a magnitude of 3.7 and is visible to the unaided eye ...
Omegna, Roberto
motion picture cameraman, director, and producer of documentaries, one of the pioneers of the Italian cinema. His thorough research and filmmaking skills place him in the forefront of early documentarians.
omen
observed phenomenon that is interpreted as signifying good or bad fortune. In ancient times omens were numerous and varied and included, for instance, lightning, cloud movements, the flight of birds, ...
Ometecuhtli
(Nahuatl: "Two-Lord"), Aztec deity, the Lord of Duality, or Lord of Life, who represented one aspect of the cosmic duality of the Aztec tradition. Along with Omecihuatl, Ometecuhtli resided in ...
Ometepe Island
island in southwestern Nicaragua, the largest island in Lake Nicaragua. Ometepe actually consists of two islands joined by a narrow isthmus 2 miles (3 km) in length. Their combined area ...
ommochrome
any of a group of biological pigments (biochromes) conspicuous in the eyes of insects and crustaceans as well as in the changeable chromatophores (pigment-containing cells) in the skin of cephalopods. ...
omnivore
animal with wide food preferences, which can eat both plant and animal matter. Animals that are omnivorous frequently lack distinct specializations in their food-gathering structures and behaviour. Many small birds ...
Omo
site of paleoanthropological excavations along the southern part of the Omo River in southwestern Ethiopia. Hominin (of human lineage) fossils unearthed there between 1967 and 1974 consist of about 200 ...
Omoto
religious movement of Japan that had a large following in the period between World War I and World War II and that served as a model for numerous other sects ...
Omotoso, Kole
Nigerian novelist, playwright, and critic who wrote from a Yoruba perspective and coupled the folklore he learned as a child with his adult studies in Arabic and English. His major ...
Omphalea
genus of tropical shrubs or trees of the spurge family (Euphorbiaceae), comprising 15 species; 12 are native to the Americas, 3 to the Old World. O. triandra, the Jamaican cobnut, ...
Omri
(reigned 876-869 or c. 884-c. 872 BC), king of Israel, the father of Ahab.
Omsk
oblast (province), west central Russia, covering an area of 53,900 sq mi (139,700 sq km) in the basin of the middle Irtysh River. Its entire surface is an extremely flat ...
Omsk
city and administrative centre of Omsk oblast (province), west-central Russia, on the Irtysh River at its junction with the Om. Omsk, founded in 1716 as a stronghold at the eastern ...
Omura
city, Nagasaki Prefecture (ken), Kyushu, Japan, facing Omura-wan (Omura Bay), on the western slopes of Tara-dake (Mt. Tara). In the 12th century it was the residence of the Omura daimyo ...
Omura Masujiro
Japanese scholar and soldier popularly regarded in Japan as the founder of the modern Japanese Army.
Omuta
city, Fukuoka Prefecture (ken), northern Kyushu, Japan, on the east coast of the Ariake-kai (Ariake Sea). Formerly a coal-mining centre, Omuta's activity declined after the 1960s with the conversion from ...
Ona
South American Indians once inhabiting the island of Tierra del Fuego and now extinct. They were historically divided into two major sections: Shelknam and Haush. They spoke different dialects and ...
Ona, Pedro de
first known poet born in Chile.
onager
(Equus hemionus onager), subspecies of the wild ass of Asia that ranged from northwest Iran to Turkmenistan. Pale-coloured and small, it has a short erect mane and fairly large ears. ...
Onagraceae
evening primrose family of flowering plants, belonging to the myrtle order (Myrtales), comprising 21 genera concentrated in the temperate region of the New World. The family is characterized by flowers ...
Onassis, Aristotle Socrates
Greek shipping magnate who developed a fleet of supertankers and freighters larger than the navies of many countries.
Onassis, Jacqueline Kennedy
American first lady (1961-63), the wife of John F. Kennedy, 35th president of the United States, who was noted for her style and elegance. Her second husband, Aristotle Onassis, was ...
Onate, Juan de
conquistador who established the colony of New Mexico for Spain. During his despotic governorship, he vainly sought the mythical riches of North America and succeeded instead in unlocking the geographical ...
onchocerciasis
filarial disease caused by the helminth Onchocerca volvulus, which is transmitted to humans by the bite of the black fly Simulium. The disease is found chiefly in Mexico, Guatemala, and ...
Oncidium
genus of some 450 species of tropical and subtropical American orchids, family Orchidaceae, that vary greatly in size and shape. Most species grow on other plants and have flowers that ...
oncogene
genetic material that carries the ability to induce cancer. An oncogene is a sequence of deoxyribonucleic acid (DNA) that has been altered or mutated from its original form, the proto-oncogene. ...
oncopod
collective name for three groups of animals: Onychophora and Tardigrada, which are free-living forms, and Pentastomida, which are parasitic. Onychophora and Tardigrada are considered to be separate phyla, although some ...
Ondaatje, Michael
Canadian novelist and poet whose musical prose and poetry are created from a blend of myth, history, jazz, memoirs, and other forms.
Ondangwa
settlement, northern Namibia, about 335 miles (540 km) north of Windhoek, the capital. In 1870, Onandjokue, near Ondangwa, was the site of the first Christian (Finnish Lutheran) mission in Owambo. ...
ondes martenot
(French: "musical waves"), electronic musical instrument demonstrated in 1928 in France by the inventor Maurice Martenot. Oscillating radio tubes produce electric pulses at two supersonic sound-wave frequencies. They in turn ...
Ondo
town, Ondo state, southwestern Nigeria, at the southern edge of the Yoruba Hills (elevation 940 feet [287 m]) and the intersection of roads from Ife, Akure, and Okitipupa. A collecting ...
Ondo
state, western Nigeria. It was created out of former Ondo province of former Western state in 1976. It is bounded by the states of Kwara and Kogi on the north, ...
Ondorhaan
town, eastern Mongolian People's Republic. Situated on the Kerulen River, 180 miles (290 km) east of Ulaanbaatar, the town lies at a major junction of transportation routes between Ulaanbaatar and ...
One Thousand Guineas
one of the five English Classic horse races, run over a straight mile (1.6 km) on the Rowley Mile course at the Newmarket (Suffolk) spring meeting. The race was first ...
One Ton Cup
international racing trophy for sailing yachts of about one-ton displacement. From 1907 to 1955 the cup was the object of a major competition for 20-foot (6-metre) yachts, but with the ...
one-horse shay
open two-wheeled vehicle that was the American adaptation of the French chaise. Its chairlike body, seating the passengers on one seat above the axle, was hung by leather braces from ...
Oneg Shabbat
(Hebrew: "Joy of Sabbath"), informal Sabbath (or Friday evening) gathering of Jews in a synagogue or private home to express outwardly the happiness inherent in the Sabbath holiday. Now more ...
Onega, Lake
second largest lake in Europe, situated in the northwest part of the European portion of Russia, between Lake Ladoga and the White Sea. It covers an area of 3,753 square ...
Oneida
Iroquoian-speaking North American Indian tribe of what is now central New York state and one of the original five nations of the Iroquois League (q.v.; Iroquois Confederacy). Like the other ...
Oneida
city, Madison county, central New York, U.S. It lies on Oneida Creek, 6 miles (10 km) southeast of Oneida Lake and 26 miles (42 km) east of Syracuse. Founded in ...
Oneida
county, central New York state, U.S., bounded to the west by Oneida Lake and Creek and to the east by West Canada Creek and Hinckley Reservoir. It largely consists of ...
Oneida Community
utopian religious community that developed out of a Society of Inquiry established by John Humphrey Noyes and some of his disciples in Putney, Vt., U.S., in 1841. As new recruits ...
oneiromancy
prophetic divination from dreams, considered a divine act in most ancient cultures and surviving to modern times in certain folk traditions. Oneiromancy is based on the belief that dreams are ...
Oneonta
city, Otsego county, east-central New York, U.S. It lies in the Catskill foothills, on the Susquehanna River, within the town (township) of Oneonta, some 80 miles (129 km) southwest of ...
Onesti
city, Bacau judet (county), eastern Romania. The city was developed as a planned new town, begun in 1953 on the site of a 15th-century settlement. It was originally named for ...
Onetti, Juan Carlos
Uruguayan novelist and short-story writer whose existential works chronicle the decay of modern urban life. The protagonists of his novels lead unhappy, isolated lives in an absurd and sordid world ...
oni
in Japanese folklore, a type of demonic creature often of giant size, great strength, and fearful appearance. They are generally considered to be foreign in origin, perhaps introduced into Japan ...
Onin War
(1467-77), civil war in the central Kyoto region of Japan, that began in the Onin period (1467-68) and was a prelude to a prolonged period of domestic strife (1490-1590). It ...
onion
(species Allium cepa), herbaceous biennial plant and its edible bulb. The onion is probably native to southwestern Asia but is now grown throughout the world, chiefly in the temperate zones. ...
Onitsha
port and market town in Anambra State, southern Nigeria. The town lies on the east bank of the Niger River just south of its confluence with the Anambra River. Founded ...
Onitsha market literature
20th-century genre of sentimental, moralistic novellas and pamphlets produced by a semiliterate school of writers (students, fledgling journalists, and taxi drivers) and sold at the bustling Onitsha market in eastern ...
online system
any electronic interactive system that delivers information to users via telephone lines to personal computers (PCs) or via cables to terminals. Such a service provides information, usually in text form, ...
Onn bin Ja'afar, Dato
Malayan political leader who played a leading role in the Merdeka (independence) movement and the establishment of the Federation of Malaya, forerunner of the present independent nation of Malaysia.
Ono Tofu
Japanese calligrapher known as one of the Sanseki ("Three Brush Traces"), in effect the first calligraphers of the age. The others were Fujiwara Yukinari and Fujiwara Sukemasa, and the three ...
Onoe Shoroku II
Japanese kabuki actor, one of the foremost interpreters of the classical kabuki plays, who specialized in female roles (all kabuki players are male).
onomatopoeia
the naming of a thing or action by a vocal imitation of the sound associated with it (such as buzz or hiss). Onomatopoeia may also refer to the use of ...
Onomichi
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 port of ...
Onondaga
county, central New York state, U.S., bounded by the Oswego and Oneida rivers to the north, Oneida Lake to the northeast, De Ruyter Reservoir to the southeast, Skaneateles Lake to ...
Onondaga
tribe of Iroquoian-speaking North American Indians who lived in what is now New York state. The Onondaga inhabited villages of wood and bark longhouses occupied by related families. They moved ...
Onsager, Lars
Norwegian-born American chemist whose development of a general theory of irreversible chemical processes gained him the 1968 Nobel Prize for Chemistry.
Ontake, Mount
mountain, rising to an elevation of 10,049 feet (3,063 m) on the boundary of Gifu and Nagano prefectures, central Honshu, Japan. A compound volcano with a heavy snow mantle in ...
Ontario
county, western New York state, U.S., located southeast of Rochester and bounded by Seneca Lake to the east, Canandaigua Lake to the southeast, and Hemlock Lake and Honeoye Creek to ...
Ontario
city, San Bernardino county, southern California, U.S. It is situated in the Riverside-San Bernardino portion of the consolidated Los Angeles metropolitan area on the site of the Spanish colonial Rancho ...
Ontario
city, Malheur county, eastern Oregon, U.S. It lies at the juncture of the Snake and Malheur rivers, 60 miles (97 km) west of Boise, Idaho, on the historic Oregon Trail. ...