Columbia Encyclopedia

Search results

500 results found

Bréal, Michel Jules Alfred

(Encyclopedia)Bréal, Michel Jules Alfred mēshĕlˈ zhül älfrĕdˈ brāälˈ [key], 1832–1915, French philologist. He is best known for his Essai de semantique (1897), which gave great impetus to scientific in...

Lenz's law

(Encyclopedia)Lenz's law, physical law, discovered by the German scientist H. F. E. Lenz in 1834, that states that the electromotive force (emf) induced in a conductor moving perpendicular to a magnetic field tends...

Grünberg, Peter Andreas

(Encyclopedia)Grünberg, Peter Andreas pāˈtər ändrāˈäs grünbĕrkˈ [key], 1939–2018 German physicist, b. Pilsen, Germany (now Plzeň, Czech Republic). After receiving his Ph.D. at the Darmstadt Univ. of T...

Alexander, Harold Rupert Leofric George, 1st Earl Alexander of Tunis

(Encyclopedia)Alexander, Harold Rupert Leofric George, 1st Earl Alexander of Tunis lĕfˈrĭk [key], 1891–1969, British field marshal. His long military career began with service in World War I, followed by a per...

bean weevil

(Encyclopedia)bean weevil, common name for a well-known cosmopolitan species of beetle (Acanthoscelides obtectus) that attacks beans and is thought to be native to the United States. It belongs to the family Bruchi...

Western Union Telegraph Company

(Encyclopedia)Western Union Telegraph Company, enterprise created (1851) to provide telegraphic communications services in the United States. Originally known as the New York and Mississippi Valley Printing Telegra...

loudspeaker

(Encyclopedia)CE5 Electrodynamic loudspeaker loudspeaker or speaker, device used to convert electrical energy into sound. It consists essentially of a thin flexible sheet called a diaphragm that is made to vibr...

hysteresis

(Encyclopedia)hysteresis hĭsˌtərēˈsĭs [key], phenomenon in which the response of a physical system to an external influence depends not only on the present magnitude of that influence but also on the previous...

Fort Bragg

(Encyclopedia)Fort Bragg, U.S. army base, 11,136 acres (4,507 hectares), E N.C., N of Fayetteville; est. 1918. Originally an artillery post, it is now the principal U.S. army airborne-training center and the site o...

Garland

(Encyclopedia)Garland, city (2020 pop. 246,018), Dallas co., N Tex., a suburb of Dallas; inc. 1891. Since World War II, Garland has grown from an agricultural communi...