[TA] one of the ducts, numbering 15-20, which drain the lobes of the mammary gland; they open at the nipple. SYN: ductus lactiferi [TA], canalicular ducts (1), galactophore, galactophorous canals, galactophorous ducts, mamillary ducts, mammary ducts, milk ducts, tubuli galactophori, tubuli lactiferi.
