"dead body of an animal," late 13c., from Anglo-French carcois, from or influenced by Old French charcois (Modern French carcasse) "trunk of a body, chest, carcass," and Anglo-Latin carcosium "dead body," all of unknown origin; original form uncertain. It may have been assimilated to Latin caro "flesh." Not used of humans after c. 1750, except contemptuously. Italian carcassa probably is a French loan-word.
1690s in the scientific use in mechanics, "product of the mass and velocity of a body; quantity of motion of a moving body," from Latin momentum "movement, moving power" (see moment). Figurative use, "force gained by movement, an impulse, impelling force," dates from 1782.
by c. 1950, an abbreviation of body odor; an advertisers' invention.
"a body of lawmakers," 1670s; see legislator + -ure.
"imperfect absorption (of food, by the body)," 1879, from mal- + absorption.