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black light

(Encyclopedia)black light: see ultraviolet radiation. ...

black locust

(Encyclopedia)black locust: see locust.

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 prices. Such tr...

Black Monday

(Encyclopedia)Black Monday, Oct. 19, 1987, in U.S. history, day of financial panic. The Dow Jones Average fell 508.32 points, a drop of 22.6%, the largest since 1914. The point decline as well as the volume, 604.33...

Black Mountains

(Encyclopedia)Black Mountains: see Appalachian Mountains; Mitchell, Mount. ...

Black Muslims

(Encyclopedia)Black Muslims, African-American religious movement in the United States, split since the late 1970s into the American Society of Muslims and the Nation of Islam. The original group was founded (1930) ...

Black Panthers

(Encyclopedia)Black Panthers, U.S. African-American militant party, founded (1966) in Oakland, Calif., by Huey P. Newton and Bobby Seale. Originally aimed at armed self-defense against the local police, the party g...

black quarter

(Encyclopedia)black quarter: see blackleg.

Black River

(Encyclopedia)Black River. 1 River rising in SE Mo. and flowing c.300 mi (480 km) SE, then SW to the White River near Newport, Ark. It is partly navigable. Clearwater Dam is on the river near Piedmont, Mo. 2 River ...