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Actors Studio, The

(Encyclopedia)Actors Studio, The, organization founded 1947 in New York City by the directors Cheryl Crawford, Elia Kazan, and Robert Lewis to train professional actors. Long directed (1948–82) by Lee Strasberg a...

valence, in chemistry

(Encyclopedia)valence, combining capacity of an atom expressed as the number of single bonds the atom can form or the number of electrons an element gives up or accepts when reacting to form a compound. Atoms are c...

Quincy, Josiah, 1744–75, political leader in the American Revolution

(Encyclopedia)Quincy, Josiah kwĭnˈzē [key], 1744–75, political leader in the American Revolution, b. Boston. An outstanding lawyer, he wrote a series of anonymous articles for the Boston Gazette in which he op...

chorus, in music

(Encyclopedia)chorus, in music, large group of singers performing in concert; a group singing liturgical music is a choir. The term chorus may also be used for a group singing or dancing together in a musical or in...

Aquila, in astronomy

(Encyclopedia)Aquila [Lat.,=the eagle], equatorial constellation located N of Sagittarius and Capricornus, lying partly in the Milky Way. It is sometimes depicted as an eagle. It contains the bright star Altair (Al...

thrush , in medicine

(Encyclopedia)thrush, in medicine, infection caused by the fungus Candida albicans, manifested by white, slightly raised patches on the mucous membrane of the tongue, mouth, and throat. The mucous membrane beneath ...

joint, in geology

(Encyclopedia)joint, in geology, fracture in rocks along which no appreciable movement has occurred (see fault). Nearly vertical, or sheet, joints that result from shrinkage during cooling are commonly found in ign...

arc, in electricity

(Encyclopedia)arc, in electricity, highly luminous and intensely hot discharge of electricity between two electrodes. The arc was discovered early in the 19th cent. by the English scientist Sir Humphry Davy, who so...

Frederick the Fair

(Encyclopedia)Frederick the Fair, c.1286–1330, German antiking (1314–26), duke of Austria, son of Albert I, German king. On the death of Henry VII, Holy Roman emperor and German king, the split between the supp...

AIDS, in medicine

(Encyclopedia)AIDS or acquired immunodeficiency syndrome, fatal disease caused by a rapidly mutating retrovirus that attacks the immune system and leaves the victim vulnerable to infections, malignancies, and neuro...