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Winnetka

(Encyclopedia)Winnetka wĭnĕtˈkə [key], village (1990 pop. 12,174), Cook co., NE Ill., a residential suburb of Chicago, on Lake Michigan; inc. 1869. It is renowned for its public school system, various education...

Tennessee, University of

(Encyclopedia)Tennessee, University of, main campus at Knoxville; land-grant and state supported; coeducational; chartered 1794, opened 1795 as Blount College; became East Tennessee College 1807; closed 1807–20; ...

spinel

(Encyclopedia)spinel, magnesium aluminum oxide, MgAl2O4, a mineral crystallizing in the isometric system, usually as octahedrons. It occurs as an accessory mineral in basic igneous rocks, in aluminum-rich metamorph...

Welland Ship Canal

(Encyclopedia)Welland Ship Canal, 27.6 mi (44.4 km) long, SE Ont., Canada, connecting Lake Ontario with Lake Erie and bypassing Niagara Falls. Built between 1914 and 1932 by Canada to replace a canal opened in 1829...

Lorentz, Hendrik Antoon

(Encyclopedia)Lorentz, Hendrik Antoon hĕnˈdrək änˈtōn lōˈrĕnts [key], 1853–1928, Dutch physicist, a pioneer in formulating the relations between electricity, magnetism, and light. He was one of the first...

Mammoth Cave National Park

(Encyclopedia)Mammoth Cave National Park, 52,830 acres (21,396 hectares), central Kentucky, authorized 1926, est. 1941. Located in a hilly, forested region, it offers numerous outdoor activities. It is the site of ...

Henry, Joseph

(Encyclopedia)Henry, Joseph, 1797–1878, American physicist, b. Albany, N.Y., educated at Albany Academy. He taught (1826–32) mathematics and natural philosophy at Albany Academy and was professor of natural phi...

Gaucher's disease

(Encyclopedia)Gaucher's disease gōshāzˈ [key], rare genetic disease involving a deficiency of an enzyme, glucocerebrosidase, which normally breaks down certain body glycolipids (i.e., lipids (fats) that have a s...

cryptosporidium

(Encyclopedia)cryptosporidium krĭpˌtōspərĭdˈēəm [key], genus of protozoans having at least four species; they are waterborne parasites that cause the disease cryptosporidiosis. One of the species appears to...

Chang Chih-tung

(Encyclopedia)Chang Chih-tung jängˈ jûrˈ-do͝ongˈ [key], 1837–1909, Chinese Ch'ing dynasty statesman and educational reformer. He occupied the high post of governor-general for over two decades, first of Gua...