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Cossacks

(Encyclopedia)Cossacks kŏsˈăks, –əks [key], Rus. Kazaki, Ukr. Kozaky, peasant-soldiers in Ukraine and in several regions of Russia who, until 1918, held certain privileges in return for rendering military ser...

Deep Sea Drilling Project

(Encyclopedia)Deep Sea Drilling Project, U.S. program designed to investigate the evolution of ocean basins by core drilling of ocean sediments and underlying oceanic crust. Funded by the National Science Foundatio...

production

(Encyclopedia)production, in economics, all those activities that have to do with the creation of commodities, by imparting to raw materials utility, added value, or the ability to satisfy human wants. The farmer w...

McCarthy, Joseph Raymond

(Encyclopedia)McCarthy, Joseph Raymond, 1908–57, U.S. senator from Wisconsin (1947–57), b. near Appleton, Wis. He practiced law in Wisconsin and became (1940) a circuit judge. He served with the U.S. marines in...

arsenic

(Encyclopedia)arsenic ärˈsənĭk [key], a semimetallic chemical element; symbol As; at. no. 33; at. wt. 74.92160; m.p. 817℃ (at 28 atmospheres pressure); sublimation point 613℃; sp. gr. (stable form) 5.73; va...

Nanjing

(Encyclopedia)Nanjing nănˈkĭngˈ [key] [southern capital], city (1994 est. pop. 2,224,200), capital of Jiangsu prov., E central China, in a bend of the Chang (Yangtze) River. It has served at times in the past a...

Alcott, Bronson

(Encyclopedia)Alcott, Bronson ôlˈkət, ăl–, –kŏt [key], 1799–1888, American educational and social reformer, b. near Wolcott, Conn., as Amos Bronson Alcox. His meager formal education was supplemented by ...

bacteriophage

(Encyclopedia)bacteriophage băktērˈēəfājˌ [key], virus that infects bacteria and sometimes destroys them by lysis, or dissolution of the cell. Bacteriophages, or phages, have a head composed of protein, an i...

motor, electric

(Encyclopedia)CE5 Motor: In the AC motor, current fed to the conducting loop of wire causes it to rotate in the magnetic field, thus turning the shaft on which the loop is mounted. In the DC motor, the direction...

maser

(Encyclopedia)maser māˈzər [key], device for creation, amplification, and transmission of an intense, highly focused beam of high-frequency radio waves. The name maser is an acronym for microwave amplification b...