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carbon black

(Encyclopedia) carbon black, mixture of partially burned hydrocarbons. Carbon black is produced by partial combustion of natural gas. It is used as a black pigment for inks and paints, and is used in…

black market

(Encyclopedia) black market, the selling or buying of commodities at prices above the legal ceiling or beyond the amount allotted to a customer in countries that have placed restrictions on sales and…

black fly

(Encyclopedia) black fly, name for any of the flies of the family Simuliidae. The black fly is about 1&fslsh;8 in. (3.2 mm) long and has large eyes, short legs, a stout, humped back, broad gauzy…

bone black

(Encyclopedia) bone black, solid black material, largely carbon, produced by heating animal bones to high temperatures in the absence of air so as to drive off volatile substances. Finely divided…

black hole

(Encyclopedia) black hole, in astronomy, celestial object of such extremely intense gravity that it attracts everything near it and in some instances prevents everything, including light, from…

Black Hawk

MacataimeshekiakiakSauk leaderBorn: 1768Birthplace: Saukenuk, Ill. In the late 18th century, the Indians of the upper Mississippi Valley witnessed the replacement of the relatively sympathetic…

Black Belt

(Encyclopedia) Black Belt, term applied to several areas of Mississippi and Alabama, the heart of the Old South, which are characterized by black soil and excellent cotton-growing conditions. The…

Black Elk

Oglala Lakota holy manBorn: 1863Birthplace: Little Powder River, Wyoming Black Elk's life encompassed the U.S.-Sioux wars, the Battle of the Little Big Horn, and the 1890 massacre at Wounded Knee…

Black Watch

(Encyclopedia) Black Watch or Royal Highland Regiment, Scottish infantry regiment. The first companies were raised in 1725 to watch the rebellious Scottish highlands and keep the peace, and the…

Black Hills

(Encyclopedia) Black Hills, rugged mountains, c.6,000 sq mi (15,540 sq km), enclosed by the Belle Fourche and Cheyenne rivers, SW S.Dak. and NE Wyo., and rising c.2,500 ft (760 m) above the…