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。
1.1
- 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。
1.2
- Physics the ratio of the amplitudes in successive cycles of a damped oscillation【物理】减幅量, 衰减率。
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。
词源
early 17th cent. (as a noun)： from Latin decrementum 'diminution'， from the stem of decrescere 'to decrease'.