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Reutlingen

(Encyclopedia) ReutlingenReutlingenroitˈlĭng-ən [key], city (1994 pop. 107,607), Baden-Württemberg, SW Germany. Manufactures include textiles, paper, leather goods, iron, and machinery. Reutlingen…

determinant

(Encyclopedia) determinant, a polynomial expression that is inherent in the entries of a square matrix. The size n of the square matrix, as determined from the number of entries in any row or column…

vaporization

(Encyclopedia) vaporization, change of a liquid or solid substance to a gas or vapor. There is fundamentally no difference between the terms gas and vapor, but gas is used commonly to describe a…

formula, in chemistry

(Encyclopedia) formula, in chemistry, an expression showing the chemical composition of a compound. Formulas of compounds are used in writing the equations (see chemical equations) that represent…

competition, in biology

(Encyclopedia) competition, in biology, relationship between members of the same or different species in which individuals are adversely affected by those having the same living requirements, such as…

Delaroche, Hippolyte

(Encyclopedia) Delaroche, HippolyteDelaroche, Hippolyteēpôlētˈ dəlärôshˈ [key], 1797–1856, French historical and portrait painter, known as Paul Delaroche. He studied with Gros. The exhibition of his…

epoch

(Encyclopedia) epoch, unit of geologic time that is a subdivision of a period. The Pleistocene and Holocene epochs, for example, are divisions of the Quaternary period. Epoch is also used to describe…

feud

(Encyclopedia) feud, formalized private warfare, especially between family groups. The blood feud (see vendetta) is characteristic of those societies in which a strong central government either has…

Vos, Cornelis de

(Encyclopedia) Vos, Cornelis deVos, Cornelis dekôrnāˈlĭs də vōs [key], 1584–1651, Flemish portrait and figure painter. He was a contemporary of Rubens, who sent many sitters to him. Although of the…

Sheeler, Charles

(Encyclopedia) Sheeler, Charles, 1883–1965, American painter and photographer, b. Philadelphia, studied at the School of Industrial Art there and later at the Pennsylvania Academy of the Fine Arts…