duct / dəkt/ • n. a channel or tube for conveying something, in particular: ∎  (in a building or a machine) a tube or passageway for air, liquid, cables, etc. ∎  (in the body) a vessel for conveying lymph or glandular secretions such as tears or bile. ∎  (in a plant) a vessel for conveying water, sap, or air.• v. [tr.] (usu. be ducted) convey through a duct: a ventilation system that must be ducted through the wall | [as adj.] (ducted) a ducted air system .

duct †course, direction; †stroke drawn; tube or canal in an animal or vegetable body XVII; conduit XVIII. — L. ductus leading, conduct, in medL. aqueduct, f. duct-, pp. stem of dūcere lead (see TEAM).

duct A tube or passage in an organism that is involved in the secretion or excretion of substances (see gland).

duct (dukt) n. a tubelike structure or channel, especially one for carrying glandular secretions.