posterior lip of external os of uterus(redirected from labium posterius ostii uteri)
pos·te·ri·or lip of external os of uterus[TA]
the portion of the uterine cervix that bounds the ostium posteriorly. It is slightly longer than the anterior lip, intervening between the cervical canal and the posterior fornix of the vagina.
Synonym(s): labium posterius ostii uteri [TA]