Duct (industrial exhaust)
WordNet

noun


(1)   An enclosed conduit for a fluid
(2)   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"
(3)   A continuous tube formed by a row of elongated cells lacking intervening end walls
 
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