"innermost layer of the skin," 1836, from Latin corium "skin, hide, leather," related to cortex "bark," scortum "skin, hide," from PIE root *sker- (1) "to cut" (compare Sanskrit krtih "hide;" Old Church Slavonic scora "skin," Russian skora "hide," kora "bark;" Welsh corwg "boat made with leather skins," all from the same root).
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