- an enclosure, usually of sheet metal, that conducts heated or conditioned air.
Origin of air duct
Examples from the Web for air duct
Historical Examples of air duct
But who would think of putting a burglar alarm on an air-duct?The Romantic Analogue
The ancient conception of the artery as an air-duct gave rise to the derivation from Gr.
These fishes have lost the air-duct and on the whole they show the greatest development of the greatest number of structures.A Guide to the Study of Fishes, Volume 1 (of 2)
David Starr Jordan