schnorchel


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Noun1.schnorchel - air passage provided by a retractable device containing intake and exhaust pipesschnorchel - air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
air duct, air passage, airway - a duct that provides ventilation (as in mines)
pigboat, submarine, U-boat, sub - a submersible warship usually armed with torpedoes