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Habitat for Humanity

(Encyclopedia)Habitat for Humanity, nonprofit ecumenical Christian organization that enables low-income people to own affordable, livable housing. Headquartered in Americus, Ga., it was founded in 1976 by former bu...

diapensia

(Encyclopedia)diapensia dīəpĕnˈsēə [key], common name for the Diapensiaceae, a family of low evergreen shrubs native to cool and arctic regions of the Northern Hemisphere. The species that are restricted to t...

Europa Island

(Encyclopedia)Europa Island yo͝orōˈpə [key], volcanic island, c.11 sq mi (28 sq km), between Madagascar and Mozambique in the Mozambique Channel, W Indian Ocean, part of the Scattered Islands district in the Fr...

Schick test

(Encyclopedia)Schick test, diagnostic test designed to evaluate susceptibility to diphtheria. A small amount of diphtheria toxin is injected into the skin; the injection will produce an area of redness and swelling...

polybrominated biphenyl

(Encyclopedia)polybrominated biphenyl or PBB, any of a group of organic compounds used as a fire retardant. In 1973 several thousand pounds of PBB were accidentally mixed with livestock feed that was later distribu...

Saint Charles

(Encyclopedia)Saint Charles. 1 City (1990 pop. 22,501), Kane co., NE Ill., on the Fox River, a suburb of Chicago; inc. 1850. Located in an agricultural area (corn and soybeans), the city has food-processing, alumin...

Tromelin Island

(Encyclopedia)Tromelin Island trōmlăNˈ [key], c.1 sq mi (2.6 sq km), in the Indian Ocean c.260 mi (420 km) E of Madagascar, part of the Scattered Islands district with the French Southern and Antarctic Lands. A ...

nuclear winter

(Encyclopedia)nuclear winter, theory holding that the smoke and dust produced by a large nuclear war would result in a prolonged period of cold on the earth. The earliest version of the theory, which was put forwar...

obsidian

(Encyclopedia)obsidian ŏbsĭdˈēən [key], a volcanic glass, homogeneous in texture and having a low water content, with a vitreous luster and a conchoidal fracture. The color is commonly black, but may be some s...

solder

(Encyclopedia)solder sŏdˈər [key], metal alloy used in the molten state as a metallic binder. The type of solder to be used is determined by the metals to be united. Soft solders are commonly composed of lead an...