(Encyclopedia) chalcopyritechalcopyritekălˌkəpīˈrīt, kălˈkōpīˌrīt [key] or copper pyriteschalcopyritepīrīˈtēz, pə– [key], brass-yellow mineral, sometimes with an iridescent tarnish. It is a sulfide…
(Encyclopedia) Chaldaea or ChaldeaChaldaeaboth: kăldēˈə [key], properly the southernmost portion of the valley of the Tigris and the Euphrates rivers. Sometimes it is extended to include Babylonia…
(Encyclopedia) air traffic control, the system by which airplanes are safely routed into and out of major airports. Air traffic control in the United States is centered in a number of regional…
(Encyclopedia) Chaleur BayChaleur Bayshəl&oobreve;rˈ [key], inlet of the Gulf of St. Lawrence, c.85 mi (140 km) long and from 15 to 25 mi (24–40 km) wide, between N N.B. and the Gaspé Peninsula,…
(Encyclopedia) Chalfie, Martin, 1947–, American biologist, b. Chicago, Ph.D. Harvard, 1977. In 1982 Chalfie joined the faculty at Columbia, where he is now the William R. Kenan, Jr., Professor of…
(Encyclopedia) Chalgrin, Jean FrançoisChalgrin, Jean FrançoiszhäN fräNswäˈ shälgrăNˈ [key], 1739–1811, French architect. He studied under Servandoni and in Italy as a winner of the Grand Prix de Rome…
(Encyclopedia) chalice [Lat.,=cup], ancient name for a drinking cup, retained for the eucharistic or communion cup. Its use commemorates the cup used by Jesus at the Last Supper. Celebrated examples…
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