Columbia Encyclopedia

Search results

500 results found

Kuhn, Thomas Samuel

(Encyclopedia)Kuhn, Thomas Samuel, 1922–96, American philosopher and historian of science, b. Cincinnati, Ohio. He trained as a physicist at Harvard (Ph.D. 1949), where he taught the history of science from 1948 ...

Aetolian League

(Encyclopedia)Aetolian League, confederation centering in the cities of Aetolia. It was formed in the 4th cent. b.c. and began to gain power in the 3d cent. in opposing the Achaean League and the Macedonians. At it...

Strawson, Peter Frederick

(Encyclopedia)Strawson, Peter Frederick, 1919–2009, British philosopher, grad. Oxford 1940. An influential advocate for so-called ordinary language philosophy, he began teaching at Oxford in 1947 and from 1968 to...

Wigner, Eugene Paul

(Encyclopedia)Wigner, Eugene Paul wĭgˈnər [key], 1902–95, American physicist, b. Hungary, grad. Technische Hochschule, Berlin, 1925. He was a professor at Princeton from 1930 to 1936 and again from 1938 to 197...

Three Mile Island

(Encyclopedia)Three Mile Island, site of a nuclear power plant 10 mi (16 km) south of Harrisburg, Pa. On Mar. 28, 1979, failure of the cooling system of the No. 2 nuclear reactor led to overheating and partial melt...

Weinreich, Uriel

(Encyclopedia)Weinreich, Uriel, 1926–67, Polish-American linguist, b. Vilnius, Poland (now in Lithuania), Ph.D. Columbia Univ., 1951. Weinreich taught linguistics at Columbia (1951–67) and is noted for his cont...

sapphire

(Encyclopedia)sapphire, precious stone. A transparent blue corundum, it is classified among the most valuable of gems. Sapphires are found chiefly in Madagascar, Sri Lanka, and Myanmar and also in Thailand, Tanzani...

reredos

(Encyclopedia)reredos rērˈdŏs [key], ornamented wall or screen that rises behind the high altar of a church, forming a background for it. It may be placed against the apse wall at the extreme end or directly beh...

silage

(Encyclopedia)silage ĕnˈsəlĭj [key], succulent, moist feed made by storing a green crop in a silo. The crop most used for silage is corn; others are sorghum, sunflowers, legumes, and grass. In a sealed silo, ty...

peroxide

(Encyclopedia)peroxide pərŏkˈsīd [key], chemical compound containing two oxygen atoms, each of which is bonded to the other and to a radical or some element other than oxygen; e.g., in hydrogen peroxide, H2O2, ...