| labium posterius ostii uteri | The portion of the uterine cervix that bounds the ostium posteriorly. It is slightly longer than labium anterius, intervening between the cervical canal and the posterior fornix of the vagina. Synonym: labium posterius ostii uteri. (05 Mar 2000) |
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| labium superius oris | The muscular fold forming the superior border of the mouth. Synonym: labium superius oris. (05 Mar 2000) |