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Pronunciation varies by accent · noun
(chemistry) The cation CH⁺, several isotopic forms of which exist in deep space.
Use methylidynium when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Methylidynium means (chemistry) The cation CH⁺, several isotopic forms of which exist in deep space.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use methylidynium where its definition matches the intended context.
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