en·tro·py /ˈɛntrəpɪ/ 名詞
En·tro·py n. 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.
The entropy of the universe tends towards a maximum. --Clausius.
n 1: (communication theory) a numerical measure of the
uncertainty of an outcome; "the signal contained
thousands of bits of information" [syn: information, selective
2: (thermodynamics) a thermodynamic quantity representing the
amount of energy in a system that is no longer available
for doing mechanical work; "entropy increases as matter
and energy in the universe degrade to an ultimate state of
inert uniformity" [syn: randomness, S]