Word not found in any official scrabble dictionaries.
"Air-duct" Definition
noun
A duct or passage conveying air; specifically, in ichthyology, the communication of the air-bladder with the intestinal canal. it is persistent in physostomous, temporary in physoclistous, fishes.
Source: Century Dictionary
In building, same as airdrain.
Source: Century Dictionary
In the heating and ventilation of buildings, a large pipe, often built of wood or thin metal, used to transmit air, either cold or hot.
Source: Century Dictionary
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