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Oxygen mask

British pronunciation/ˈɒksɪdʒən mˈask/
American pronunciation/ˈɑːksɪdʒən mˈæsk/
Oxygen mask
[NOUN]
1

a breathing device worn over the nose and mouth that is hooked up to an oxygen tank

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oxygen mask definition and meaning
Examples
1Oxygen masks really are there for your safety.
2Now, folks, those are oxygen masks.
3In case of an emergency, oxygen masks only have enough airflow to last for about 15 minutes.
4Aaron: They have little oxygen masks.
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