1350-1400;Middle Englishconsumpcyon (< Middle French) < Latinconsūmptiōn- (stem of consūmptiō) a consuming, wasting, equivalent to consūmpt(us), past participle of consūmere to consume (con-con- + sūmp- (variant stem of sūmere to take up, spend) + -tus past participle suffix) + -iōn--ion
late 14c., from O.Fr. consomption, from L. consumptionem (nom. consumptio) "a using up, wasting," from consumptus, pp. of consumere (see consume). Earliest sense in English was of wasting disease, in which it replaced O.E. yfeladl "the evil disease." Meaning "the using up of material" is 1530s.