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magnesium
(Encyclopedia) magnesiummagnesiummăgnēˈzēəm, –zhəm [key], metallic chemical element; symbol Mg; at. no. 12; at. wt. 24.3050; m.p. about 648.8℃; b.p. about 1,090℃; sp. gr. 1.738 at 20℃; valence +2. In…oil industry
(Encyclopedia) oil industry, the business of discovering oil (petroleum), extracting it from the ground, refining it into a variety of products, and distributing it to the public. The development of…mosque
(Encyclopedia) mosquemosquemŏsk [key], building for worship used by members of the Islamic faith. Muhammad's house in Medina (a.d. 622), with its surrounding courtyard and hall with columns, became…Kuwait
(Encyclopedia) CE5 Kuwait or KowaitKowaitk&oobreve;wātˈ [key], officially State of Kuwait, constitutional emirate (2015 est. pop. 3,936,000), 6,177 sq mi (16,000 sq km), NE Arabian peninsula,…Douglas, Stephen Arnold
(Encyclopedia) Douglas, Stephen Arnold, 1813–61, American statesman, b. Brandon, Vt. The Democratic national convention at Charleston, S.C., in 1860 adopted Douglas's recommendations in a platform…Sahara
(Encyclopedia) SaharaSaharasəhârˈə [key] [Arab.,=desert], world's largest desert, c.3,500,000 sq mi (9,065,000 sq km), N Africa; the western part of a great arid zone that continues into SW Asia.…pollution
(Encyclopedia) pollution, contamination of the environment as a result of human activities. The term pollution refers primarily to the fouling of air, water, and land by wastes (see air pollution;…Northwest Territories
(Encyclopedia) CE5 Northwest Territories, territory (2001 pop. 37,360), 532,643 sq mi (1,379,028 sq km), NW Canada. The Northwest Territories lie W of Nunavut, N of lat. 60°N, and E of Yukon.…Mexico, city, Mexico
(Encyclopedia) Mexico or Mexico City, Span. Ciudad de México (Méjico), city (1990 pop. 8,236,960; 1991 met. area est. 20,899,000), central Mexico, capital and largest city of Mexico. The city…abolitionists
(Encyclopedia) abolitionists, in U.S. history, particularly in the three decades before the Civil War, members of the movement that agitated for the compulsory emancipation of the slaves.…Trending
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