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exponential decay

   Also found in: Medical, Wikipedia 0.02 sec.
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Noun1.exponential decay - a decrease that follows an exponential function
decay, decline - a gradual decrease; as of stored charge or current
relaxation behavior, relaxation - (physics) the exponential return of a system to equilibrium after a disturbance


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The rate of elimination fit best to a two-phase exponential decay with a biologic half-life of 12 and 266 hr.
When a quantity decreases by a fixed fraction--here 1/2--it's known as exponential decay.
If, for example, one combines the last known term with half the previous term, adding or subtracting according to the toss of a coin, the sequence's numbers decrease at a certain rate, displaying exponential decay.
 
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