decremental


dec·re·ment

D0081300 (dĕk′rə-mənt)n.1. The act or process of decreasing or becoming gradually less.2. The amount lost by gradual diminution or waste.3. Mathematics The amount by which a variable is decreased; a negative increment.
[Latin dēcrēmentum, from dēcrēscere, dēcrē-, to decrease; see decrease.]
dec′re·ment′al (-mĕn′tl) adj.

decremental

(ˌdɛkrɪˈmɛntəl) adjrelating to a small amount that is taken away