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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
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.