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isoniazid

(Encyclopedia)isoniazid īˌsōnīˈəzĭd [key], drug used to treat tuberculosis. Also known as isonicotinic acid hydrazide, isoniazid is the most effective antituberculosis drug currently available. The drug inhi...

Grotowski, Jerzy

(Encyclopedia)Grotowski, Jerzy yĕˈzhĭ grôtôfˈskē [key], 1933–99, Polish stage director and theatrical theorist. Grotowski was founder and director of the small but influential Polish Laboratory Theatre (19...

Hebrews, book of the New Testament

(Encyclopedia)Hebrews, an anonymous New Testament homily with closing greetings normally associated with the letter genre, written before c.a.d. 96. It is addressed to Jewish Christians who were being pressured to ...

Simon, Herbert Alexander

(Encyclopedia)Simon, Herbert Alexander, 1916–2001, American social scientist and economist, b. Milwaukee, grad. Univ. of Chicago (B.A., 1936, Ph.D., 1943). A professor of computer science and psychology at Carneg...

Burton, Robert

(Encyclopedia)Burton, Robert, 1577–1640, English clergyman and scholar, b. Leicestershire, educated at Oxford. He served as librarian at Christ Church, Oxford, all his life; in addition he was vicar of St. Thomas...

phonon

(Encyclopedia)phonon fōˈnŏn [key], quantum of vibrational energy. The atoms of any crystal are in a state of vibration, their average kinetic energy being measured by the absolute temperature of the crystal. In ...

Wood, Robert Williams

(Encyclopedia)Wood, Robert Williams, 1868–1955, American physicist, b. Concord, Mass., grad. Harvard (B.A., 1891). After studying abroad he became associated with Johns Hopkins as professor of experimental physic...

dust, atmospheric

(Encyclopedia)dust, atmospheric, minute particles slowly settling or suspended by slight currents and existing in varying amounts in all air. There is least dust at high levels over the ocean and most at low levels...

watercolor painting

(Encyclopedia)watercolor painting, in its wider sense, refers to all pigments mixed with water rather than with oil and also to the paintings produced by this process; it includes fresco and tempera as well as aqua...

mass extinction

(Encyclopedia)mass extinction, the extinction of a large percentage of the earth's species, opening ecological niches for other species to fill. There have been at least ten such events. The five greatest were thos...