Meaning of AIR DUCT

Pronunciation:			ehr dukt
WordNet Dictionary
	Definition:		[n]  a duct that provides ventilation as in mines
	Synonyms:		air passage, airway
	See Also:		blowhole, breather, duct, register, schnorchel, schnorkel, snorkel, snorkel breather, upcast, vent, venthole, ventilation shaft