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Purbeck

(Encyclopedia)Purbeck, district (1991 pop. 42,600), Dorset, England. Purbeck is filled with the clays of the Hampshire Basin, and is therefore largely infertile. Some minor farming occurs on the chalk plateaus and ...

gadolinium

(Encyclopedia)gadolinium gădəlĭnˈēəm [key], metallic chemical element; symbol Gd; at. no. 64; at. wt. 157.25; m.p. 1,312℃; b.p. 3,233℃; sp. gr. 7.898 at 25℃; valence +3. Gadolinium is a malleable, ducti...

parity

(Encyclopedia)parity or space parity, in physics, quantity that refers to the relationship between an object or process and the image that it can produce in a mirror. For example, any right-handed object will produ...

Rowhani, Hassan

(Encyclopedia)Rowhani, Hassan häsänˈ rōhänēˈ [key], 1948–, Iranian cleric and political leader, b. Sorkheh, ...

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 the oil industry...

protozoan

(Encyclopedia)protozoan prōˌtəzōˈən [key], informal term for the unicellular heterotrophs of the kingdom Protista. Protozoans comprise a large, diverse assortment of microscopic or near-microscopic organisms ...

cosmology

(Encyclopedia)cosmology, area of science that aims at a comprehensive theory of the structure and evolution of the entire physical universe. The earliest pre-Ptolemaic theories assumed that the earth was the cent...

Hughes, Sir Samuel

(Encyclopedia)Hughes, Sir Samuel, 1853–1921, Canadian political leader, b. Ontario. A schoolteacher and newspaper editor, he entered the House of Commons in 1892 and held a seat until his death. As minister of mi...

Atchafalaya

(Encyclopedia)Atchafalaya əchăˈfəlīˌə [key], navigable river, c.170 mi (270 km) long, S central La. The Atchafalaya meanders south, in a former channel of the Mississippi, to the Gulf of Mexico. A distributa...

West Virginia University

(Encyclopedia)West Virginia University, mainly at Morgantown; coeducational; land-grant and state supported; est. and opened 1867 as an agricultural college, renamed 1868. It operates 15 schools and colleges, inclu...