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|Noun||1.||breathing device - a device that facilitates breathing in cases of respiratory failure|
aqualung, Aqua-Lung, scuba - a device (trade name Aqua-Lung) that lets divers breathe under water; scuba is an acronym for self-contained underwater breathing apparatus
device - an instrumentality invented for a particular purpose; "the device is small enough to wear on your wrist"; "a device intended to conserve water"
oxygen mask - a breathing device that is placed over the mouth and nose; supplies oxygen from an attached storage tank
resuscitator - a breathing apparatus used for resuscitation by forcing oxygen into the lungs of a person who has undergone asphyxia or arrest of respiration
snorkel - 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