1.Definition: 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"

Related Noun(s):canal, channel

Category: General

2.Definition: a continuous tube formed by a row of elongated cells lacking intervening end walls

Category: Plants

3.Definition: an enclosed conduit for a fluid

Category: Objects