os uteri internum


isth·mus of u·ter·us

[TA] an elongated constriction at the junction of the body and cervix of the uterus. Synonym(s): isthmus uteri [TA], Guyon isthmus, orificium internum uteri, os uteri internum, ostium uteri internum

os uteri internum

The internal opening of the cervical canal into the uterus.See also: os