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amphetamine

(Encyclopedia)amphetamine ămfĕtˈəmēn [key], any one of a group of drugs that are powerful central nervous system stimulants. Amphetamines have stimulating effects opposite to the effects of depressants such as...

D'Avenant, Sir William

(Encyclopedia)D'Avenant or Davenant, Sir William dăvˈənənt [key], 1606–68, English poet, playwright, and theatrical producer. His life and work bridge the gap between the Elizabethan and Restoration ages. His...

decay of organic matter

(Encyclopedia)decay of organic matter or putrefaction, process whereby heterotrophic organisms, including some bacteria, fungi, saprophytic plants, and lower animals, utilize the remains of once-living tissue as a ...

martial arts

(Encyclopedia)martial arts, various forms of self-defense, usually weaponless, based on techniques developed in ancient China, India, and Tibet. In modern times they have come into wide use for self-protection, as ...

Boyle, Richard, 1st earl of Cork

(Encyclopedia)Boyle, Richard, 1st earl of Cork, 1566–1643, English settler in Ireland. He first went to Ireland in 1588 and in 1602 purchased for a small sum Sir Walter Raleigh's large landholdings in Cork, Water...

D'Alembert's principle

(Encyclopedia)D'Alembert's principle dălˈəmbârzˌ [key], in mechanics, principle permitting the reduction of a problem in dynamics to one in statics. This is accomplished by introducing a fictitious force equal...

W and Z particles

(Encyclopedia)W and Z particles, elementary particles that mediate, or carry, the fundamental force associated with weak interactions. The discovery of the W and Z particles at CERN near Geneva, Switzerland, in the...

Geary, John White

(Encyclopedia)Geary, John White gērˈē [key], 1819–73, American politician and Union general in the Civil War, b. Mt. Pleasant, Pa. In San Francisco from 1849 to 1852, Geary was the first U.S. postmaster, the l...

Fuller, R. Buckminster

(Encyclopedia)Fuller, R. Buckminster (Richard Buckminster Fuller), 1895–1983, American architect and engineer, b. Milton, Mass. Fuller devoted his life to the invention of revolutionary technological designs aime...

Nielsen, A. C.

(Encyclopedia)Nielsen, A. C. (Arthur Charles Nielsen) nēlˈsən [key], 1897–1980, American market researcher, b. Chicago, grad. Univ. of Wisconsin, Madison (B.S., 1918). He worked as an electrical engineer befor...