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Pronunciation varies by accent · noun
(organic chemistry) The cyclic lactone derived from 4-hydroxybutanoic acid; any of its derivatives.
Use butanolide when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Butanolide means (organic chemistry) The cyclic lactone derived from 4-hydroxybutanoic acid; any of its derivatives.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use butanolide where its definition matches the intended context.
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