> as lemmas

a. Physiology. A tube or canal in the animal body, by which the bodily fluids are conveyed. Formerly used in a wide sense, so as to include the blood vessels and alimentary canal, but now applied more strictly to the vessels conveying the chyle, lymph, and secretions. Also used attributively in such phrases as duct-cancer, duct-cyst, duct-papilloma, = (cancer, etc.) affecting the epithelium of the ducts of the mammary glands.These have names expressing their position or character, or in some cases the name of their discoverer, as biliary, choledoch, cystic, efferent, genito-urinary, hepatic, lactiferous, lymphatic, nasal, pancreatic, parotid, thoracic duct. (See these words.) Also ducts of Bellini, the excretory tubes of the kidneys; duct of Bartholin, ducts of Rivinus, certain ducts of the sublingual gland; Steno's duct, that of the parotid gland, which conveys saliva into the mouth; Wharton's duct, that of the submaxillary gland, also conveying saliva; duct of Wirsung, the principal pancreatic duct; Wolffian duct, the excretory duct of the Wolffian body or primitive kidney.