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Pronunciation varies by accent · noun
(chemistry) Any oxide containing three oxygen atoms for every two atoms of another element..
Use sesquioxide when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Sesquioxide means (chemistry) Any oxide containing three oxygen atoms for every two atoms of another element..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use sesquioxide where its definition matches the intended context.
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