Entropy En"tro*py, n. [Gr. ? a turning in; ? in + ? a turn, fr. ? to turn.] (Thermodynamics) A certain property of a body, expressed as a measurable quantity, such that when there is no communication of heat the quantity remains constant, but when heat enters or leaves the body the quantity increases or diminishes. If a small amount, h, of heat enters the body when its temperature is t in the thermodynamic scale the entropy of the body is increased by h / t. The entropy is regarded as measured from some standard temperature and pressure. Sometimes called the {thermodynamic function}. [1913 Webster]

The entropy of the universe tends towards a maximum. --Clausius. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • entropy — [en′trə pē] n. [Ger entropie, arbitrary use (by R. J. E. Clausius, 1822 88, Ger physicist) of Gr entropē, a turning toward, as if < Ger en(ergie), ENERGY + Gr tropē, a turning: see TROPE] 1. a thermodynamic measure of the amount of energy… …   English World dictionary

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  • entropy — 1868, from Ger. Entropie measure of the disorder of a system, coined 1865 (on analogy of Energie) by German physicist Rudolph Clausius (1822 1888) from Gk. entropia a turning toward, from en in (see EN (Cf. en ) (2)) + trope a turning (see TROPE… …   Etymology dictionary

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  • entropy —    The tendency of all matter and energy in the universe including all systems, societies, etc. to change toward a state of disorder or randomness. The works of earth artists Robert Smithson (American, 1938 1973), for example reflect an interest… …   Glossary of Art Terms

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