en·tro·py /ˈɛntrəpi/
 熵


 en·tro·py /ˈɛntrəpɪ/ 名詞
 熵,衰退


 entropy
 煙; 熵


 entropy
 熵


 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.

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 entropy
      n 1: (communication theory) a numerical measure of the
           uncertainty of an outcome; "the signal contained
           thousands of bits of information" [syn: information, {selective
           information]
      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]