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Teniers, David

(Encyclopedia)Teniers, David tənērzˈ, tĕnˈyərz, Flemish tĕnērsˈ [key], the elder, 1582–1649, Flemish painter. He spent many years in Rome. Works attributed to him have often been confused with the early ...

aberration of starlight

(Encyclopedia)aberration of starlight, displacement of the apparent path of light from a star, resulting in a displacement of the apparent position of the star from its true position; discovered by the English astr...

Mount, William Sidney

(Encyclopedia)Mount, William Sidney, 1807–68, American genre and portrait painter, b. Setauket, N.Y. His childhood was spent at Stony Brook, Long Island, the scene of many of his pictures. At 17 he was apprentice...

CAT scan

(Encyclopedia)CAT scan kăt [key] [computerized axial tomography], X-ray technique that allows relatively safe, painless, and rapid diagnosis in previously inaccessible areas of the body; also called CT scan. An X-...

nutation

(Encyclopedia)nutation, in astronomy, a slight wobbling motion of the earth's axis. The causes of nutation are similar to those of the precession of the equinoxes, involving the varying attraction of the moon on th...

mechanics

(Encyclopedia)mechanics, branch of physics concerned with motion and the forces that tend to cause it; it includes study of the mechanical properties of matter, such as density, elasticity, and viscosity. Mechanics...

chow chow

(Encyclopedia)chow chow, breed of powerful nonsporting dog whose origins are obscure but whose development was accomplished many centuries ago in China. It stands from 18 to 20 in. (45.7–50.8 cm) high at the shou...

Bailyn, Bernard

(Encyclopedia)Bailyn, Bernard bāˈlĭn [key], 1922–2020, U.S. historian, b. Hartford, Conn. After receiving his Ph.D. from Harvard (1953), he taught U.S. colonial history there, becoming a full professor in 1961...

auteur

(Encyclopedia)auteur ōtörˈ [key], in film criticism, a director who so dominates the film-making process that it is appropriate to call the director the auteur, or author, of the motion picture. The auteur theor...

Lorentz contraction

(Encyclopedia)Lorentz contraction lôrˈĕnts [key], in physics, contraction or foreshortening of a moving body in the direction of its motion, proposed by H. A. Lorentz on theoretical grounds and based on an earli...