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/ˈhiː.liˌɛə/ · noun
(underwater diving) A mixture of helium, nitrogen and oxygen, used as a breathing gas instead of normal air..
Use heliair when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Heliair means (underwater diving) A mixture of helium, nitrogen and oxygen, used as a breathing gas instead of normal air..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use heliair where its definition matches the intended context.
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