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Wiktionary
epithelial duct

n. (context anatomy English) Any duct lined with epithelium

WordNet
epithelial duct

n. a bodily passage or tube lined with epithelial cells and conveying a secretion or other substance; "the tear duct was obstructed"; "the alimentary canal"; "poison is released through a channel in the snake's fangs" [syn: duct, canal, channel]