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The time required for an exponential system to return 1/e (0.368) of its initial value of equilibrium after perturbation.
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|Noun||1.||relaxation time - the time constant of an exponential return of a system to equilibrium after a disturbance|
time constant - (electronics) the time required for the current or voltage in a circuit to rise or fall exponentially through approximately 63 per cent of its amplitude