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corundum
(Encyclopedia)corundum kərŭnˈdəm [key], mineral, aluminum oxide, Al2O3. The clear varieties are used as gems and the opaque as abrasive materials. Corundum occurs in crystals of the hexagonal system and in mass...Gaonim
(Encyclopedia)Gaonim gāōˈnĭm [key] [Heb.,=excellencies], title given to the heads of the Jewish academies at Sura and Pumbedita in Babylonia immediately following the period of the Saboraim until the middle of ...Turrell, James
(Encyclopedia)Turrell, James, 1943–, American installation and land artist, b. Los Angeles, grad. Pomona College (B.A., 1965), Claremont Graduate School (M.F.A., 1973). Turrell's career began in the 1960s art sce...Carlos the Jackal
(Encyclopedia)Carlos the Jackal, pseud. of the revolutionary and international terrorist Ilich Ramírez Sánchez, 1949–, b. Caracas, Venezuela. Son of an affluent Marxist lawyer, he joined the Communist party at ...Abbadids
(Encyclopedia)Abbadids ăˈbədĭdz [key], Arab dynasty in Spain that ruled Seville from 1023 to 1091. Taking advantage of the disintegration of the caliphate of Córdoba, the cadi [judge-governor] of Seville seize...tensor
(Encyclopedia)tensor, in mathematics, quantity that depends linearly on several vector variables and that varies covariantly with respect to some variables and contravariantly with respect to others when the coordi...Ter Borch, Gerard
(Encyclopedia)Ter Borch or Terborch, Gerard gāˈrärt tərbôrkhˈ [key], 1617–81, Dutch genre and portrait painter. He studied with his father and traveled throughout Europe, showing extraordinary precocity in ...weather satellite
(Encyclopedia)weather satellite, artificial satellite used to gather data on a global basis for improvement of weather forecasting. Information includes cloud cover, storm location, temperature, and heat balance in...Stratford de Redcliffe, Stratford Canning, Viscount
(Encyclopedia)Stratford de Redcliffe, Stratford Canning, Viscount, 1786–1880, British diplomat. He entered (1807) the foreign office under the aegis of his cousin, George Canning. Sent (1808) to Turkey, he negoti...Woolley, Sir Charles Leonard
(Encyclopedia)Woolley, Sir Charles Leonard, 1880–1960, English archaeologist. His early work included excavations at Carchemish (1912–14) and the Egyptian site of Tell el Amarna (1921–22). He was then chosen ...Browse by Subject
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