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n. pl. en·tro·pies
1. Symbol S For a closed thermodynamic system, a quantitative measure of the amount of thermal energy not available to do work.
2. A measure of the disorder or randomness in a closed system.
3. A measure of the loss of information in a transmitted message.
4. The tendency for all matter and energy in the universe to evolve toward a state of inert uniformity.
5. Inevitable and steady deterioration of a system or society.

[German Entropie : Greek en-, in; see en-2 + Greek tropē, transformation; see trep- in Indo-European roots.]

en·tro′pic (ĕn-trō′pĭk, -trŏp′ĭk) adj.
en·tro′pi·cal·ly adv.


(General Physics) pertaining to entropy
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