The milk ducts, also called lactiferous ducts, are the tubes that carry your breast milk from where it is made in the glandular tissue of your breast out to your nipple. (verywellfamily.com)
More recently, researchers such as Ramsay et al (2005) have questioned the existence of lactiferous sinuses. (emedicine.medscape.com)
Each ductule was believed to independently drain to a duct that, in turn, emptied into lactiferous sinuses. (emedicine.medscape.com)