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arc, in geometry

(Encyclopedia)arc, in geometry, a curved line or any part of it; in particular, a portion of the circumference of a circle. The length s of an arc of a circle of radius r and subtending a central angle of θ radian...

Weyburn

(Encyclopedia)Weyburn wāˈbərn [key], city (1991 pop. 9,673), SE Sask., Canada, SE of Regina. A trade center for a wheat-growing and oil-producing region, it has grain elevators and a feed mill. Power-line and tr...

Boise, river, United States

(Encyclopedia)Boise, river, c.160 mi (260 km) long, rising in SW Idaho and flowing west to join the Snake River at the Oregon line. In 1811 the Boise River, originally called Reed's River, was explored by an expedi...

Big Stone Lake

(Encyclopedia)Big Stone Lake, narrow lake, c.25 mi (40 km) long, on the Minn.–S.Dak. line. Located in the outlet channel of glacial Lake Agassiz, it is the source of the Minnesota River and serves as a storage re...

rhyme

(Encyclopedia)rhyme or rime, the most prominent of the literary artifices used in versification. Although it was used in ancient East Asian poetry, rhyme was practically unknown to the ancient Greeks and Romans. Wi...

Dunant, Jean Henri

(Encyclopedia)Dunant, Jean Henri zhäN äNrēˈ dünäNˈ [key], 1828–1910, Swiss philanthropist and founder of the International Red Cross, b. Geneva. In 1862 appeared his Un souvenir de Solférino (tr. The Orig...

Goodrich, Leland Matthew

(Encyclopedia)Goodrich, Leland Matthew, 1899–1990, American political scientist, b. Lewiston, Maine, grad. Bowdoin College, 1920, and Harvard (M.A., 1921; Ph.D., 1925). He taught political science at Brown Univ. ...

Williams, Jody

(Encyclopedia)Williams, Jody, 1950–, American social activist, b. Putney, Vt., grad. Univ. of Vermont (B.A., 1972), School for International Training, Brattleboro, Vt. (M.A., 1976), Johns Hopkins (M.A., 1984). Af...

Black, Eugene Robert

(Encyclopedia)Black, Eugene Robert, 1898–1992, American financier, b. Atlanta, grad. Univ. of Georgia (B.A., 1917). After serving in the navy during World War I and working at the investment firm Harris, Forbes, ...

Blatter, Sepp

(Encyclopedia)Blatter, Sepp (Joseph S. Blatter), 1936–, Swiss sports executive, grad. Univ. of Lausanne, 1959. He served as general secretary of the Swiss Ice Hockey Federation and director of sports timing and p...