coitus http://purl.bioontology.org/ontology/MESH/D003075 E1.0.0.0.0.0.9 The sexual union of a male and a female, a term used for human only. This term refers only to penile-vaginal penetration in humans in which sperm is transferred. coetus coital coituses coitus copulation human sexual behavior reproductive sequence sexual intercourse human The Encyclopedia of Unusual Sex Practices The Complete Dictionary of Sexology