(Encyclopedia) Compton effect [for A. H. Compton], increase in the wavelengths of X rays and gamma rays when they collide with and are scattered from loosely bound electrons in matter. This effect…
(Encyclopedia) conjunctivitisconjunctivitiskənjəngtəvīˈtəs [key], inflammation or infection of the mucosal membrane that covers the eyeball and lines the eyelid, usually acute, caused by a virus or,…
(Encyclopedia) Chatterjee, Bankim ChandraChatterjee, Bankim Chandrabəngˈkĭm chŭnˈdrə chäˈtərjē [key], 1838–94, Indian nationalist writer, b. Bengal. He popularized a Bengali prose style that became…
(Encyclopedia) ChrysophytaChrysophytakrəsŏfˈətə [key], phylum (division) of unicellular marine or freshwater organisms of the kingdom Protista consisting of the diatoms (class Bacillariophyceae), the…
(Encyclopedia) RolloRollorŏlˈō [key] or HrolfRollorŏlf [key], c.860–c.932, first duke of Normandy. As leader of the Norman pirates settled at the mouth of the Seine, he attacked (910) Paris and…
(Encyclopedia) Becker, Carl Lotus, 1873–1945, American historian, b. Blackhawk co., Iowa. He taught history at Dartmouth College (1901–2), at the Univ. of Kansas (1902–16), and at Cornell (1917–41).…
(Encyclopedia) proverb, short statement of wisdom or advice that has passed into general use. More homely than aphorisms, proverbs generally refer to common experience and are often expressed in…
(Encyclopedia) psychrometerpsychrometersīkrŏmˈĭtər [key], one of many instruments used for measuring the water vapor content or relative humidity of the atmosphere. It consists of two identical…
(Encyclopedia) Roach, Hal (Harold Eugene Roach, Sr.), 1892–1992, American move producer and director, b. Elmira, N.Y. He entered (1912) the motion-picture industry as an extra, and by 1914 had…
(Encyclopedia) ohmmeterohmmeterōmˈmēˌtər [key], instrument used to measure the electrical resistance of a conductor. It is usually included in a single package with a voltmeter, and often an ammeter…
