duct /ˈdəkt/ 名詞
1. Any tube or canal by which a fluid or other substance is conducted or conveyed.
2. Anat. One of the vessels of an animal body by which the products of glandular secretion are conveyed to their destination.
3. Bot. A large, elongated cell, either round or prismatic, usually found associated with woody fiber.
Note: ☞ Ducts are classified, according to the character of the surface of their walls, or their structure, as annular, spiral, scalariform, etc.
4. Guidance; direction. [Obs.]
n 1: 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: epithelial
duct, canal, channel]
2: a continuous tube formed by a row of elongated cells lacking
intervening end walls
3: an enclosed conduit for a fluid