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Pronunciation varies by accent · noun
A red allotrope of oxygen, O₈, that is stable only under very high pressures.
Use octaoxygen when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Octaoxygen means A red allotrope of oxygen, O₈, that is stable only under very high pressures.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use octaoxygen where its definition matches the intended context.
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