coition (n.)youdaoicibaDictYouDict[coition 词源字典]
1540s, "going together, coming together," from Late Latin coitionem (nominative coitio), noun of action from coitus, past participle of coire "to go together, come together" (see coitus). Meaning "sexual copulation" is attested in English from 1610s.[coition etymology, coition origin, 英语词源]