decrement

decrement
[ˈdɛkrɪm(ə)nt]
noun
  1. a reduction or diminution
    减少，减缩
    relaxation produces a decrement in sympathetic nervous activity.
    休息可以减少交感神经活动。
    ■an amount by which something is reduced or diminished
    减少量，缩减量
    the dose was reduced by 10 mg weekly decrements.
    药量每周减少十毫克。
    ■(Physics)the ratio of the amplitudes in successive cycles of a damped oscillation
    (物理)减幅量， 衰减率
verb
  1. [with obj.](chiefly Computing)cause a discrete reduction in (a numerical quantity)
    (主计算机)使（数值）减少
    the instruction decrements the accumulator by one.
    指令减少累加器的一个数值。
语源
  1. early 17th cent. (as a noun): from Latin decrementum 'diminution', from the stem of decrescere 'to decrease'
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