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oyster: any member of the families Ostreidae (true oysters) or Aviculidae (pearl oysters), bivalve mollusks found in temperate and warm coastal waters of all oceans. Bivalves known as thorny oysters (Spondylus) ...
Oyster Bay: town (urbanized township), Nassau county, southeastern New York, U.S. It extends from the north to south shores on central Long Island, and comprises more than 30 incorporated villages and unincorporated ...
oystercatcher: any of several shorebirds, notable for their long, flattened, orange-red bills, constituting the genus Haematopus, family Haematopodidae. Found in temperate to tropical parts of the world, oystercatchers are stout-bodied birds ...
oystershell scale: (Lepidosaphes ulmi), an insect (order Homoptera) whose protective covering resembles a miniature oystershell. The oystershell scale inflicts great damage on the trees and shrubs on which it lives. Control is ...
Oz Beg: Mongol leader and khan of the Golden Horde, or Kipchak empire, of southern Russia, under whom it attained its greatest power; he reigned from 1312 to 1341. Oz Beg was ...
Oz, Amos: Israeli novelist, short-story writer, and essayist.
Ozaki Koyo: novelist, essayist, and haiku poet, one of the pioneers of modern Japanese literature.
Ozaki Yukio: noted democratic politician who was elected to the Japanese House of Representatives a total of 25 times and is considered the "father of parliamentary politics" in that country.
Ozal, Turgut: Turkish politician, prime minister from 1983 to 1989 and president from 1989 to 1993.
Ozamis: city, on Zamboanga peninsula, northwestern Mindanao, Philippines. The city lies on Panguil Bay, an extension of Iligan Bay of the Bohol (Mindanao) Sea. It was the site of Spanish fortifications ...
Ozanam, Antoine Frederic: French historian, lawyer, and scholar who founded the Society of St. Vincent de Paul.
Ozark: city, seat (1870) of Dale county, southeastern Alabama, U.S., about 20 miles (30 km) northwest of Dothan. The city was first settled about 1822 and named Merricks for its first ...
Ozark Mountains: heavily forested group of highlands in the south-central United States, extending southwestward from St. Louis, Mo., to the Arkansas River. The mountains occupy an area of about 50,000 square miles ...
Ozark-Saint Francis National Forest: forest areas mainly in central and northwestern Arkansas, U.S., but also including a segment along the Mississippi River in the eastern part of the state. The forest consists of several ...
ozarkodiniform: conodont, or small fossil that is toothlike in form and structure, that has a prominent, centrally located denticle flanked on either side by smaller, less pointed denticles. In some forms ...
Ozarks, Lake of the: lake in south-central Missouri, U.S., about 42 miles (68 km) southwest of Jefferson City, one of the largest man-made lakes in the United States. It is impounded by Bagnell Dam, ...
Ozawa, Seiji: Japanese American conductor, especially noted for his energetic style and his sweeping performances of 19th-century Western symphonic works.
Ozenfant, Amedee: French painter and theoretician, who cofounded the 20th-century art movement known as Purism.
Ozick, Cynthia: American novelist, short-story writer, and intellectual whose works seek to define the challenge of remaining Jewish in contemporary American life. By delving into the oldest religious sources of Judaism, Ozick ...
ozier pattern: in tableware, molded basket-weave pattern produced in Germany in the 1730s on Meissen porcelain tableware. It was probably one of the numerous inventions of the celebrated modeler Johann Joachim Kandler. ...
Ozma, Project: attempt undertaken in 1960 to detect radio signals generated by hypothetical intelligent beings living near stars other than the Sun. Some 150 hours of intermittent observation during a four-month period ...
ozokerite: (from Greek ozokeros, "odoriferous wax"), naturally occurring, light yellow to dark brown mineral wax composed principally of solid paraffinic hydrocarbons (compounds chiefly of hydrogen and carbon atoms linked in chains). ...
Ozolua: African king, the greatest warrior-king of Benin (in modern Nigeria). Ozolua was able to extend the boundaries of Benin from the Niger River in the east virtually to Lagos in ...
ozone: (O₃), triatomic allotrope of oxygen (a form of oxygen in which the molecule contains three atoms instead of two as in the common form) that accounts for the distinctive odour ...
ozonide: any of a class of chemical compounds formed by reactions of ozone (q.v.) with other compounds. Organic ozonides, often made from olefins (q.v.), are unstable, most of them decomposing rapidly ...
ozonosphere: region in the upper atmosphere between about 10 and 50 km (6 and 30 miles) in altitude, in which there are appreciable concentrations of ozone and in which the temperature ...
Ozu Yasujiro: motion-picture director who originated the shomin-geki ("common-people's drama"), a genre dealing with lower-middle-class Japanese family life. Owing to the centrality of domestic relationships in his films, their detailed character portrayals, ...