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noun
A duct that provides ventilation (as in mines).
synonyms: air duct, airway.
is a specific kind of: duct.
is a broader term that covers: register | breather, schnorchel, schnorkel, snorkel, snorkel breather | upcast | ventilation shaft.
has as a part: blowhole, vent, vent-hole, venthole.
Find more on air passage elsewhere: etymology - rhymes - Wikipedia.
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