Columbia Encyclopedia

Search results

500 results found

actinium

(Encyclopedia)actinium ăktĭnˈēəm [key] [Gr.,=like a ray], radioactive chemical element; symbol Ac; at. no. 89; mass number of most stable isotope 227; m.p. about 1,050℃; b.p. 3,200℃±300℃; sp. gr. 10.07;...

polonium

(Encyclopedia)polonium pəlōˈnēəm [key], radioactive chemical element; symbol Po; at. no. 84; mass no. of most stable isotope 209; m.p. 254℃; b.p. 962℃; sp. gr. about 9.4; valence +2 or +4. Polonium is an e...

Metz

(Encyclopedia)Metz Eng. and Ger. mĕts, Fr. mĕs [key], city (2010 est. pop. 127,000), capital of Moselle dept., NE France, on the Moselle River. It is a cultural, commercial, and transportation center of Lorraine,...

Saint Lawrence

(Encyclopedia)Saint Lawrence, one of the principal rivers of North America, 744 mi (1,197 km) long. It issues from the northeastern end of Lake Ontario and flows northeast, first along the U.S.-Canadian border, the...

Frank, Anne

(Encyclopedia)Frank, Anne, 1929–45, German diarist, b. Frankfurt as Anneliese Marie Frank. In order to escape Nazi persecution, her family emigrated (1933) to Amsterdam, where her father Otto became a business ow...

Iberville, Pierre le Moyne, sieur d'

(Encyclopedia)Iberville, Pierre le Moyne, sieur d' pyĕr lə mwän syör dēbĕrvēlˈ [key], 1661–1706, French Canadian naval officer, founder of the French territory of Louisiana, b. Ville Marie (in present Mon...

Jospin, Lionel Robert

(Encyclopedia)Jospin, Lionel Robert zhôspăNˈ [key], 1937–, French politician, premier of France (1997–2002). He studied at the elite École Nationale d'Administration (1961–65) and worked (1965–70) in th...

Byrd, Richard Evelyn

(Encyclopedia)Byrd, Richard Evelyn, 1888–1957, American aviator and polar explorer, b. Winchester, Va. He took up aviation in 1917, and after World War I he gained great fame in the air. He commanded the naval ai...

Clinton, De Witt

(Encyclopedia)Clinton, De Witt də wĭtˈ [key], 1769–1828, American statesman, b. New Windsor, N.Y.; son of James Clinton. He was admitted (1790) to the New York bar but soon became secretary to his uncle, Georg...

Indus

(Encyclopedia)Indus ĭnˈdəs [key], chief river of Pakistan, c.1,900 mi (3,060 km) long, rising in the Kailas range in the Tibetan Himalayas, and flowing NW across Ladakh, India, then SW through Pakistan to the Ar...