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urea

(Encyclopedia)CE5 urea yo͝oēˈə [key], organic compound that is the principal end product of nitrogen metabolism in most mammals. Urea was the first animal metabolite to be isolated in crystalline form; its c...

cerium

(Encyclopedia)cerium sērˈēəm [key] [from the asteroid Ceres], metallic chemical element; symbol Ce; at. no. 58; at. wt. 140.116; m.p. 799℃; b.p. 3,426℃; sp. gr. 6.77 at 25℃; valence +3 or +4. Cerium is a ...

Ghiberti, Lorenzo

(Encyclopedia)Ghiberti, Lorenzo lōrĕnˈtsō gēbĕrˈtē [key], c.1378–1455, Florentine sculptor. He received his early training in the workshop of Bartoluccio. In 1401 he entered the competition for a bronze p...

Moore, George Edward

(Encyclopedia)Moore, George Edward, 1873–1958, English philosopher, b. Upper Norwood. He was educated at Cambridge, where he was a fellow (1898–1904) and then a lecturer (1911–25) in the department of moral s...

Aachen

(Encyclopedia)Aachen bät äˈkhən [key], city, North Rhine–Westphalia, W Germany, near the Belgian and Dutch borders. One of the great historic cities of Europe, it is now chiefly i...

poster

(Encyclopedia)poster, placard designed to be posted in some public place for purposes of commercial announcement or propaganda. Advertising makes wide use of posters, as do charitable and political organizations. I...

idealism

(Encyclopedia)idealism, the attitude that places special value on ideas and ideals as products of the mind, in comparison with the world as perceived through the senses. In art idealism is the tendency to represent...

Nibelungen

(Encyclopedia)Nibelungen –lētˌ [key] [song of the Nibelungen] is a long Middle High German epic by a south German poet of the early 13th cent. It includes pagan legends and traditions but is patently the produc...

Berg, Alban

(Encyclopedia)Berg, Alban älˈbän bĕrk [key], 1885–1935, Austrian composer. In his youth he taught himself music but in 1904 he became the pupil and close friend of Arnold Schoenberg. Later Berg himself taught...

Stuttgart, city, Germany

(Encyclopedia)Stuttgart shto͝otˈgärt [key], city (1994 pop. 594,406), capital of Baden-Württemberg, SW Germany, on the Neckar River. It is a major transportation point, with a large river port and an internatio...