decremental

noun

1. the act or process of decreasing; gradual reduction.
2. the amount lost by reduction.
3. Mathematics. a negative increment.
4. Physics. the ratio of amplitudes of a damped harmonic motion in the course of two successive oscillations.

noun

1. the act of decreasing; diminution
2. maths a negative increment
3. physics a measure of the damping of an oscillator, expressed by the ratio of the amplitude of a cycle to its amplitude after one period
4. (of spectra) a sequence of related spectrum lines decaying in intensity, e.g. Balmer decay

n.

1620s, from Latin decrementum “diminution,” from stem of decrescere (see decrease).