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spiritual

(Encyclopedia)spiritual, a religious folk song of American origin, particularly associated with African-American Protestants of the southern United States. The African-American spiritual, characterized by syncopati...

noise pollution

(Encyclopedia)noise pollution, human-created noise harmful to health or welfare. Transportation vehicles are the worst offenders, with aircraft, railroad stock, trucks, buses, automobiles, and motorcycles all produ...

music

(Encyclopedia)music. For information on types of music see such articles as absolute music; aleatory music; chamber music; church music; computer music; electronic music; jazz; program music; rock music; serial mus...

spectroscope

(Encyclopedia)spectroscope, optical instrument for producing spectral lines and measuring their wavelengths and intensities, used in spectral analysis (see spectrum). When a material is heated to incandescence it e...

string theory

(Encyclopedia)string theory, description of elementary particles based on one-dimensional curves, or “strings,” instead of point particles. Superstring theory, which is string theory that contains a kind of sym...

Chu Ta

(Encyclopedia)Chu Ta or Zhu Da both: jo͞o dä [key], c.1626–c.1705, Chinese painter and calligrapher, also known as Pa-ta-shan-jen or Bada Shanren. Said to have been a descendant of the imperial Ming family, he ...

Oldenburg, Claes

(Encyclopedia)Oldenburg, Claes klăs [key], 1929–, Swedish-American artist, b. Stockholm, raised Chicago, studied at Yale, moved to New York 1956. Usually considered part of the pop art movement, Oldenburg explor...

Ottonian art

(Encyclopedia)Ottonian art ŏtōˈnēən [key], art produced (c.900–1050) in the East Frankish kingdom of Germany known, after the emperors Otto (936–1002), as the Ottonian kingdom. Influenced by Byzantine and ...

Premadasa, Ranasinghe

(Encyclopedia)Premadasa, Ranasinghe, 1924–1993, Sri Lankan political leader. As a member of the Ceylon Labour party, he worked as a labor organizer and was elected deputy mayor of Colombo in 1955. He then joined ...

hoe

(Encyclopedia)hoe, usually a flat blade, variously shaped, set in a long wooden handle and used primarily for weeding and for loosening the soil. It was the first distinctly agricultural implement. The earliest hoe...