posterior labial commissure

pos·te·ri·or la·bi·al com·mis·sure

[TA] a slight fold uniting the labia majora posteriorly in front of the anus. Synonym(s): commissura labiorum posterior [TA]

pos·te·ri·or la·bi·al com·mis·sure

(pos-tēr'ē-ŏr lā'bē-ăl kom'i-shŭr) [TA] A slight fold uniting the labia majora posteriorly in front of the anus.