Columbia Encyclopedia

Search results

500 results found

thyristor

(Encyclopedia)thyristor, semiconductor switch used chiefly in power-control applications. Also called a silicon-controlled rectifier (SCR; see rectifier), it is a variation of the transistor. A thyristor is capable...

Parthenon

(Encyclopedia)Parthenon pärˈthənŏn [key] [Gr.,=the virgin's place], temple sacred to Athena, on the acropolis at Athens. Built under Pericles between 447 b.c. and 432 b.c., it is the culminating masterpiece of ...

public health

(Encyclopedia)public health, field of medicine and hygiene dealing with the prevention of disease and the promotion of health by government agencies. In the United States, public health authorities are engaged in m...

Hugenberg, Alfred

(Encyclopedia)Hugenberg, Alfred älˈfrĕt ho͞oˈgənbĕrkh [key], 1865–1951, German financier and politician. He was president of the directorate of the Krupp firm (1909–18), entered the Reichstag in 1919, an...

Delos

(Encyclopedia)Delos dēˈlôs [key], island, c.1 sq mi (2.6 sq km), SE Greece, in the Aegean Sea, smallest of the Cyclades. In Greek mythology, Leto gave birth to Apollo and Artemis on Delos; and the island was par...

Cuadra, Pablo Antonio

(Encyclopedia)Cuadra, Pablo Antonio, 1912–2002, Nicaraguan poet, b. Managua. Early in life, Cuadra became a member of the Vanguard literary movement and edited (1929) its journal. Influenced by Rubén Darío and ...

John the Baptist, Saint

(Encyclopedia)John the Baptist, Saint, d. c.a.d. 28–a.d. 30, Jewish prophet, considered by Christians to be the forerunner of Jesus. He was the son of Zacharias and Elizabeth, who was also a kinswoman of Mary, th...

miracle

(Encyclopedia)miracle, preternatural occurrence that is viewed as the expression of a divine will. Its awe and wonder lie in the fact that the cause is hidden. The idea of the miracle occurs especially with the evo...

Kukai

(Encyclopedia)Kukai or Kobo-Daishi ko͞oˈkī, kōˈbō-dīˈshē [key], 774–835, Japanese priest, scholar, and artist, founder of the Shingon or “True Word” sect of Buddhism. Of aristocratic birth, he studie...

Boucher, François

(Encyclopedia)Boucher, François fräNswäˈ bo͞oshāˈ [key], 1703–70, French painter. Boucher's art embodied the spirit of his time; it was elegant, frivolous, and artificial. He studied briefly with François...