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Tibbett, Lawrence

(Encyclopedia)Tibbett, Lawrence tĭbˈĭt [key], 1896–1960, American baritone, b. Bakersfield, Calif. He made his debut at the Metropolitan Opera House in 1923. After a successful appearance as Ford in Verdi's Fa...

Saint-Cloud

(Encyclopedia)Saint-Cloud săN-klo͞oˈ [key], town (1990 est. pop. 28,673), Hauts-de-Seine dept., N central France, a suburb W of Paris on the Seine River. It is a residential town and resort, with a famous racetr...

Wren, Sir Christopher

(Encyclopedia)Wren, Sir Christopher, 1632–1723, English architect. A mathematical prodigy, he studied at Oxford. He was professor of astronomy at Gresham College, London, from 1657 to 1661, when he became Savilia...

perturbation

(Encyclopedia)perturbation pŭrˌtərbāˈshən [key], in astronomy and physics, small force or other influence that modifies the otherwise simple motion of some object. The term is also used for the effect produce...

science

(Encyclopedia)science [Lat. scientia=knowledge]. For many the term science refers to the organized body of knowledge concerning the physical world, both animate and inanimate, but a proper definition would also hav...

Damrosch, Walter Johannes

(Encyclopedia)Damrosch, Walter Johannes, 1862–1950, German-American conductor and composer; son of Leopold Damrosch. At his father's death in 1885, he finished the season as conductor of the Metropolitan Opera, N...

Goldmark, Peter Carl

(Encyclopedia)Goldmark, Peter Carl, 1906–77, Hungarian-American engineer, b. Budapest. He studied at the Univ. of Vienna (B.S., 1929, Ph.D., 1931); worked for a radio company in England (1931–33). After emigrat...

Jean, Michaëlle

(Encyclopedia)Jean, Michaëlle, 1957–, Canadian journalist, filmmaker, and women's rights activist, b. Port-au-Prince, Haiti. Her family immigrated to Canada in 1968. After studying languages and literature at th...

microwave

(Encyclopedia)microwave, electromagnetic wave having a frequency range from 1,000 megahertz (MHz) to 300,000 MHz, corresponding to a wavelength range from 300 mm (about 12 in.) to 1 mm (about 0.04 in.). Like light ...

lightship

(Encyclopedia)lightship, moored vessel bearing lights and other signal devices to guide ships and warn of hazards to navigation. Lightships are generally stationed at points where a lighthouse cannot be erected; th...