in pathology, the vomiting of fecal matter, 1851, earlier in German, a Modern Latin formation from assimilated form of Greek kopros "dung" (see copro-) + emesis "a vomiting," from emein "to vomit" (see emetic). Related: Copremetic.
word-forming element indicating "dung, filth, excrement," before vowels copr-, from Latinized form of Greek kopros "dung," from PIE root *kekw- "excrement." Hence, coprology "study of obscene literature" (1856).
1650s (n.) "medicine that induces vomiting;" 1660s (adj.) "inducing vomiting;" from French émétique (16c.), from Latin emeticus, from Greek emetikos "causing vomiting," from emesis "vomiting," from emein "to vomit," from PIE *weme- "to spit, vomit" (see vomit (v.)).
<a href="https://www.etymonline.com/word/copremesis">Etymology of copremesis by etymonline</a>
Harper, D. (n.d.). Etymology of copremesis. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/copremesis