Noun
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a duct that provides ventilation (as in mines)
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air passage,
airway |
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duct an enclosed conduit for a fluid
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register a regulator (as a sliding plate) for regulating the flow of air into a furnace or other heating device
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schnorchel,
schnorkel,
snorkel breather,
breather,
snorkel air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
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upcast air passage consisting of a ventilation shaft through which air leaves a mine
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vent-hole,
venthole,
blowhole,
vent the spiracle of a cetacean located far back on the skull
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