lactiferous duct

n.
  1. Any of the ducts that drain the lobes of the mammary gland at the nipple.galactophore galactophorous duct mammary duct mamillary duct milk duct
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.