Columbia Encyclopedia

Search results

326 results found

polarization of light

(Encyclopedia)polarization of light, orientation of the vibration pattern of light waves in a singular plane. Unpolarized light can be converted into a single polarized beam by means of the Nicol prism, a device ...

transmission

(Encyclopedia)transmission, in automobiles, system of parts connecting the engine to the wheels. Suitable torque, or turning force, is generated by the engine only within a narrow range of engine speeds, i.e., rate...

United Mine Workers of America

(Encyclopedia)United Mine Workers of America (UMW), international labor union formed (1890) by the amalgamation of the National Progressive Union (organized 1888) and the mine locals under the Knights of Labor. It ...

Ba'ath party

(Encyclopedia)Ba'ath party bäˈäth [key], Arab political party, in Syria and in Iraq. Founded in Damascus in 1941 with an ideology of secularism, socialism, and pan-Arab unionism, it was reformed with the name Ba...

Van Gogh, Vincent

(Encyclopedia)Van Gogh, Vincent văn gō, Dutch vĭnsĕntˈ vän khôkh [key], 1853–90, postimpressionist painter, b. the Netherlands. Van Gogh's works are perhaps better known generally than those of any other p...

Swiss literature

(Encyclopedia)Swiss literature. The literature of Switzerland is written in German, French, Italian, and Romansh, with German predominating. The extensive literature in Romansh dialect (see Rhaeto-Romanic) is littl...

Wenceslaus, Holy Roman emperor

(Encyclopedia)Wenceslaus, 1361–1419, Holy Roman emperor (uncrowned) and German king (1378–1400), king of Bohemia (1378–1419) as Wenceslaus IV, elector of Brandenburg (1373–76), son and successor of Emperor ...

quantum theory

(Encyclopedia)quantum theory, modern physical theory concerned with the emission and absorption of energy by matter and with the motion of material particles; the quantum theory and the theory of relativity togethe...

Macedon

(Encyclopedia)Macedon măsˈədŏn [key], ancient country, roughly equivalent to the modern region of Macedonia. In the history of Greek culture Macedon had its single significance in producing the conquerors and a...

family, in sociology

(Encyclopedia)family, a basic unit of social structure, the exact definition of which can vary greatly from time to time and from culture to culture. How a society defines family as a primary group, and the functio...