Reversibility can refer to:
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Time reversibility, a property of some mathematical or physical processes and systems for which time-reversed dynamics are well defined
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Reversible diffusion, an example of a reversible stochastic process
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Reversible process (thermodynamics), a process or cycle such that the net change at each stage in the combined entropy of the system and its surroundings is zero
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Reversible reaction, a chemical reaction for which the position of the chemical equilibrium is very sensitive to the imposed physical conditions; so the reaction can be made to run either forwards or in reverse by changing those conditions
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Reversible computing, logical reversibility of a computation; a computational step for which a well-defined inverse exists
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Reversible error, a legal mistake invalidating a trial
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Reversible garment, a garment that can be worn two ways
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Piaget's theory of cognitive development, in which mental reversibility is part of the concrete operational stage, the understanding that numbers and objects can change and then return to their original state
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Reversible playing card
The following is a glossary of terms used in card games. Besides the terms listed here, there are thousands of common and uncommon slang terms. Terms in this glossary should not be game-specific (e.g. specific to Bridge, Hearts, Poker or Rummy), ...
, a playing card that may be read either way up
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