Columbia Encyclopedia

Search results

500 results found

niobium

(Encyclopedia)niobium nīōˈbēəm [key], metallic chemical element; symbol Nb; at. no. 41; at. wt. 92.90638; m.p. about 2,468℃; b.p. 4,742℃; sp. gr. 8.57 at 20℃; valence +2, +3, +4, or +5. Niobium is a rare...

Lieber, Francis

(Encyclopedia)Lieber, Francis lēˈbər [key], 1798–1872, German-American political philosopher, b. Berlin. Ardently patriotic, he enlisted in the Prussian army and fought and was wounded at the battle of Waterlo...

Kenyatta, Uhuru Muigai

(Encyclopedia)Kenyatta, Uhuru Muigai, 1961–, Kenyan politicial leader, son of Jomo Kenyatta. A Kikuyu, he entered politics in the 1990s, joining the Kenya African National Union (KANU) and ran unsuccessfully for ...

radio frequency

(Encyclopedia)radio frequency, range of electromagnetic waves with a frequency or wavelength suitable for communication uses. Some of these waves serve as carriers of the lower-frequency audio waves; others are mod...

Saint Pierre and Miquelon

(Encyclopedia)Saint Pierre and Miquelon săN pyĕr, mēkəlôNˈ [key], French territorial collectivity (2015 est. pop. 6,000), 93 sq mi (241 sq km), consisting of nine small islands S of Newfoundland, Canada, in t...

Royal Danish Ballet

(Encyclopedia)Royal Danish Ballet, one of the oldest major ballet companies, established at the opening of Denmark's Royal Theater in Copenhagen in 1748. Its ballet school, which trains the group's dancers, has als...

Passaic, city, United States

(Encyclopedia)Passaic pəsāˈĭk [key], city (1990 pop. 58,041), Passaic co., NE N.J., a port on the Passaic River; settled 1678 by Dutch traders as Acquackanonk, named Passaic 1854, inc. as a city 1873. Formerly ...

Saint-Arnaud, Armand Jacques Leroy de

(Encyclopedia)Saint-Arnaud, Armand Jacques Leroy de ärmäNˈ zhäk lərwäˈ də săNtärnōˈ [key], 1798?–1854, marshal of France. After serving in the French Foreign Legion in Algeria from 1837, he was one of...

direct action

(Encyclopedia)direct action, theory and methods used by certain labor groups to fight employers, capitalist institutions, and the state by direct economic action, without using intermediate organizations. Political...

domestic service

(Encyclopedia)domestic service, work performed in a household by someone who is not a member of the family. It was performed by slaves in many early civilizations, e.g., in Greece and Rome. Under the feudal system ...