oxygen mask

American  

noun

1. a masklike device placed or worn over the nose and mouth when inhaling supplementary oxygen from an attached tank.

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oxygen mask British  

noun

1. a device, worn over the nose and mouth, to which oxygen is supplied from a cylinder or other source: used to aid breathing

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Etymology

Origin of oxygen mask

First recorded in 1915–20

Example Sentences

Opposite Mona, her other son was holding an oxygen mask to his mouth and could not speak.

From BBC

I don’t like to spout clichés, but you do have to put your own oxygen mask on first in this situation.

From MarketWatch

Al-Salem remained seated on the video link throughout the hearing, wearing what appeared to be an oxygen mask.

From BBC

We stood there side by side and watched as Agent Chris opened her eyes, coughing hoarsely into the oxygen mask someone had put over her face.

From Literature

Even if oxygen masks weren’t needed, it is too soon to remove the seat belts.

From The Wall Street Journal