posterior labial branches of internal perineal artery

pos·te·ri·or la·bi·al branches of in·ter·nal per·i·ne·al ar·te·ry

(pos-tēr'ē-ŏr lā'bē-ăl branch'ĕz in-tĕr'năl per'i-nē'ăl ahr'tĕr-ē) Branches of the perineal artery to the posterior portion of the labium majus.