decrement

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dec·re·ment / ˈdekrəmənt/ • n. a reduction or diminution. ∎  an amount by which something is reduced or diminished:. ∎  Physics the ratio of the amplitudes in successive cycles of a damped oscillation. • v. [tr.] chiefly Comput. cause a discrete reduction in (a numerical quantity): the instruction decrements the accumulator by one.

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decrement decrease, lessening. XVII. — L. dēcrēmentum, f. dēcrē-, stem of dēcrēscere DECREASE; see -MENT.