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defoliant

(Encyclopedia)defoliant, any one of several chemical compounds that, when applied to plants, can alter their metabolism, causing the leaves to drop off. In agriculture defoliants are used to eliminate the leaves of...

Pentagon Papers

(Encyclopedia)Pentagon Papers, government study of U.S. involvement in Southeast Asia. Commissioned by Secretary of Defense Robert S. McNamara in June, 1967, the 47-volume, top secret study covered the period from ...

Whitlam, Gough

(Encyclopedia)Whitlam, Gough gŏf [key], 1916–2014, Australian political leader. Edward Gough Whitlam studied law and entered practice near Sydney after serving in World War II. A member of the Labour party, he w...

Tso Tsung-t'ang

(Encyclopedia)Tso Tsung-t'ang dzô dzo͞ong-täng [key], 1812–85, Chinese general and statesman of the Ch'ing dynasty. He directed (1852–59) resistance to the Taiping Rebellion in his native Hunan and later org...

neutrality

(Encyclopedia)neutrality, in international law, status of a nation that refrains from participation in a war between other states and maintains an impartial attitude toward the belligerents. Neutrality is not to be...

Powell, Colin Luther

(Encyclopedia)Powell, Colin Luther, 1937–2021, U.S. army general and government official, b. New York City, grad., City College (B.S., 1958); George Washington Univ...

International Physicians for the Prevention of Nuclear War

(Encyclopedia)International Physicians for the Prevention of Nuclear War (IPPNW), worldwide organization of medical groups dedicated to eliminating nuclear weapons and preventing nuclear war, est. 1980. Based in Ca...

helicopter

(Encyclopedia)helicopter, type of aircraft in which lift is obtained by means of one or more power-driven horizontal propellers called rotors. When the rotor of a helicopter turns it produces reaction torque which ...

selective service

(Encyclopedia)selective service, in U.S. history, term for conscription. Conscription was established (1863) in the U.S. Civil War, but proved unpopular (see draft riots). The law authorized release from service to...

Asia

(Encyclopedia)CE5 Asia āˈzhə [key], the world's largest continent 17,139,000 sq mi (44,390,000 sq km) and most populous (2015 est. pop. 4,419,898,000), with nearly three fifths of the world's total population...