snorkel
noun
1. breathing device consisting of a bent tube fitting into a swimmer's mouth and extending above the surface; allows swimmer to breathe while face down in the water
Definition categories: man–made, ventilator
2. air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time
Similar word(s): breather, schnorkel
Definition categories: man–made, airway