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York, city, United States

(Encyclopedia)York, city (1990 pop. 42,192), seat of York co., SE Pa., on Codorus Creek, in an agricultural area; laid out 1741, inc. as a city 1887. It is a market, trade, processing, and distribution center in th...

Rowhani, Hassan

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

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...

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...

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 ...

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...

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...

Lynchburg

(Encyclopedia)Lynchburg, independent city (1990 pop. 66,049), in but administratively not a part of Campbell co., central Va., on the James River; settled 1757, inc. as a city 1852. It is a trade center and tobacco...

Moscow State University

(Encyclopedia)Moscow State University, at Moscow, Russia, officially M. V. Lomonosov Moscow State Univ.; founded 1755 as Moscow Univ. by the Russian scientist M. V. Lomonosov, renamed Moscow State Univ. after the R...

Amarillo

(Encyclopedia)Amarillo ămərĭlˈō, –ˈə [key], city (2020 pop. 200,393), seat of Potter co., N Tex.; inc. 1899. The commercial and industrial center of the Texas Panhandle, Amaril...