co ‧ i ‧ tus /ˈkəʊətəs, ˈkəʊɪtəs, ˈkɔɪtəs $ ˈkoʊ-, ˈkɔɪ-/ BrE AmE noun [uncountable]
[ Date: 1800-1900 ; Language: Latin ; Origin: past participle of coire , from co- ( ⇨ ↑ co- ) + ire 'to go' ]
technical the act of having sex SYN sexual intercourse
—coital adjective