duct
英 [dʌkt]
美[dʌkt]
	    - n. 输送管,导管
 - vt. 用导管输送;以导管封住
 
英英释意
- 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"
 
- 2. a continuous tube formed by a row of elongated cells lacking intervening end walls
 
- 3. an enclosed conduit for a fluid