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coin

(Encyclopedia)coin, piece of metal, usually a disk of gold, silver, nickel, bronze, copper, aluminum, or a combination of such metals, stamped by authority of a government as a guarantee of its real or exchange val...

Comaneci, Nadia

(Encyclopedia)Comaneci, Nadia nädyä kōmänēch [key], 1961–, Romanian-American gymnast. Under the tutelage of coach Bela Karolyi, she rose to prominence in the celebrated Romanian gymnastics program. Comaneci ...

Flood, James Clair

(Encyclopedia)Flood, James Clair, 1826–89, American silver magnate, b. New York City. Having been apprenticed to a carriage maker, he left to join the California gold rush in 1849. The following year he returned ...

Miller, Bode

(Encyclopedia)Miller, Bode (Samuel Bode Miller) bōˈdē [key], 1977–, American skier, b. Easton. N.H. A superb athlete, he joined the U.S. ski team in 1998 and competed in the Olympics for the first time that ye...

Rapid City

(Encyclopedia)Rapid City, city (1990 pop. 54,523), seat of Pennington co., SW S.Dak., on Rapid Creek, in an irrigated farm region served by the Bureau of Reclamation's Rapid Valley project; founded 1876 after the d...

Unión, La

(Encyclopedia)Unión, La, town (1990 pop. 15,144), Murcia prov., SE Spain. It is a center for the rich lead, silver, iron, manganese, and zinc mines of the vicinity, which have been worked since Carthaginian times....

Copperbelt

(Encyclopedia)Copperbelt, mining region, N central Zambia, central Africa. A natural extension of the mineral-rich region of SE Congo, the Copperbelt is one of the richest sources of copper in the world. Cobalt, se...

precipitation, in chemistry

(Encyclopedia)precipitation, in chemistry, a process in which a solid is separated from a suspension, sol, or solution. In a suspension such as sand in water the solid spontaneously precipitates (settles out) on st...

Potosí

(Encyclopedia)Potosí pōtōsēˈ [key], city (1992 pop. 112,078), capital of Potosí dept., S Bolivia, at the foot of one of the world's richest ore mountains. In the cold, bleak, high Andes at an altitude of c.13...

Sudbury, city, Canada

(Encyclopedia)Sudbury, city (1991 pop. 92,884), central Ont., Canada. It is the center of Canada's largest mining region, which produces much of the world's nickel and large quantities of copper, platinum, gold, si...