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air duct

noun

Definition of air duct 

1 : a duct or pipe for conveying air (as to the rooms of a house or ship for ventilation or to a furnace)

2 : the duct connecting the air bladder and alimentary canal of certain fishes

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First Known Use of air duct

1744, in the meaning defined at sense 1

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The first known use of air duct was in 1744

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