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Pronunciation varies by accent · noun
A mask used in medical emergencies to deliver oxygen from a reservoir to the patient..
Use nonrebreather when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Nonrebreather means A mask used in medical emergencies to deliver oxygen from a reservoir to the patient..
Common synonyms include NRB.
The opposite depends on the specific sense.
Use nonrebreather where its definition matches the intended context.
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