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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 humor

(Encyclopedia) black humor, in literature, drama, and film, grotesque or morbid humor used to express the absurdity, insensitivity, paradox, and cruelty of the modern world. Ordinary characters or…

Black Isle

(Encyclopedia) Black Isle, peninsula, 18 mi (29 km) long and up to 9 mi (14.5 km) wide, Highland, N Scotland, extending into Moray Firth. It has some of the best farmland in N Scotland, producing…

Black Kettle

(Encyclopedia) Black Kettle, d. 1868, chief of the southern Cheyenne in Colorado. His attempt to make peace (1864) with the white men ended in the massacre of about half his people at Sand Creek.…

black lead

(Encyclopedia) black lead: see graphite.

black light

(Encyclopedia) black light: see ultraviolet radiation.

black lung

(Encyclopedia) black lung: see pneumoconiosis.

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…