also postmortem, 1734 (adverb), from Latin post mortem, from post "after" (see post-) + mortem, accusative of mors "death" (see mortal (adj.)). From 1835 as an adjective. As a noun, shortening of post-mortem examination, it is recorded from 1850.[post-mortem etymology, post-mortem origin, 英语词源]