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lutetium

(Encyclopedia)lutetium, formerly lutecium both: lo͞otēˈshēəm [key], metallic chemical element; symbol Lu; atomic number 71; at. wt. 174.9668; m.p. about 1,663℃; b.p. about 3,395℃; sp. gr. 9.835 at 25℃; v...

Caesar, Sid

(Encyclopedia)Caesar, Sid (Isaac Sidney Caesar), 1922–2014, American comedian, one of the stars of the “golden age of live television,” b. Yonkers, N.Y. While performing in a World War II military show he met...

Seeger, Ruth Crawford

(Encyclopedia)Seeger, Ruth Crawford, 1901–53, American composer and folklorist, b. East Liverpool, Ohio, as Ruth Porter Crawford, studied American Conservatory, Chicago; stepmother of Pete Seeger and mother of Mi...

digital art

(Encyclopedia)digital art, contemporary art in which computer technology is used in a wide variety of ways to make distinctive works. Digital art was pioneered in the 1970s but only came into its own as a viable ar...

Frankfurt School

(Encyclopedia)Frankfurt School, a group of researchers associated with the Institut für Sozialforschung (Institute of Social Research), founded in 1923 as an autonomous division of the Univ. of Frankfurt. The inst...

German East Africa

(Encyclopedia)German East Africa, former German colony, c.370,000 sq mi (958,300 sq km), E Africa. Dar es Salaam was the capital. German influence emerged in the area in 1884 when Carl Peters, the German explorer, ...

erbium

(Encyclopedia)erbium ûrˈbēəm [key] [from Ytterby, a town in Sweden], metallic chemical element; symbol Er; at. no. 68; at. wt. 167.259; m.p. 1,529℃; b.p. 2,863℃; sp. gr. 9.05 at 25℃; valence +3. Erbium is...

Mannheim

(Encyclopedia)Mannheim mänˈhīm [key], city (1994 pop. 318,025), Baden-Württemberg, W central Germany, on the right bank of the Rhine River and at the mouth of the Neckar River. A bridge connects it with Ludwigs...

kindergarten

(Encyclopedia)kindergarten [Ger.,=garden of children], system of preschool education. Friedrich Froebel designed (1837) the kindergarten to provide an educational situation less formal than that of the elementary s...

Phips, Sir William

(Encyclopedia)Phips, Sir William, 1651–95, American colonial governor. Born in what is today Maine, he was a carpenter and shipbuilder in Boston and became interested in sunken treasure. On his second hunt for tr...