DUCT, n. [L., to lead. See Duke.] 1. Any tube or canal by which fluid or other substance is conducted or conveyed. It is particularly used to denote the vessels of an animal body, by which the blood, chyle, lymph, etc., are carried from one part to another, and the vessels of plants in which the sap is conveyed. 2. Guidance; direction. [Little used.]
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: duct, 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
I. nounEtymology: New Latin ductus, from Medieval Latin, aqueduct, from Latin, act of leading, from ducere to lead — more at towDate: 1667 1. a bodily tube or vessel especially when carrying the secretion of a gland 2.a. a pipe, tube, or channel that conveys a substance b. a pipe or tubular runway for carrying an electric power line, telephone cables, or other conductors 3. a tube or elongated cavity (as a xylem vessel) in plant tissue 4. a layer (as in the atmosphere or the ocean) which occurs under usually abnormal conditions and in which radio or sound waves are confined to a restricted path • ductaladjective • ductlessadjectiveII. transitive verbDate: 1936 1. to enclose in a duct 2. to convey (as a gas) through a duct; also to propagate (as radio waves) through a duct
n. & v. --n. 1 a channel or tube for conveying fluid, cable, etc. 2 a a tube in the body conveying secretions such as tears etc. b Bot. a tube formed by cells that have lost their intervening end walls, holding air, water, etc. --v.tr. convey through a duct. Etymology: L ductus leading, aqueduct f. ducere duct- lead
Duct Duct, n. [L. ductus a leading, conducting, conduit, fr. ducere, ductum, to lead. See Duke, and cf. Douche.] 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.] --Hammond.
(ducts) 1. A duct is a pipe, tube, or channel which carries a liquid or gas. ...a big air duct in the ceiling.N-COUNT: usu with supp 2. A duct is a tube in your body which carries a liquid such as tears or bile. ...tear ducts.N-COUNT: with supp