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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 large amounts b...

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 prices. Such tr...

black fly

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

Cleland, Max

(Encyclopedia) Cleland, Max, 1942-2021, American politician, b. Atlanta, GA, as Joseph Maxwell Cleland, Stetson Univ. (B.A., 1964), Emory Univ. (M.A., 1968). Cleland enlisted in the Army in 1965 and served in Vie...

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 bone black is usefu...

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 escaping. The term was...

Schultze, Max Johann Sigismund

(Encyclopedia)Schultze, Max Johann Sigismund mäks yōˈhän zēˈgĭsmo͝ond sho͝olˈtsə [key], 1825–74, German biologist, director of the Anatomical Institute at Bonn from 1859. He established that the cells ...

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 Belt area was...

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 regiment was formed 1...

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 surrounding Great Plains;...