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Pronunciation varies by accent · noun
(organic chemistry) A bicyclic hydrocarbon consisting of two fused cycloheptatriene rings.
Use heptalene when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Heptalene means (organic chemistry) A bicyclic hydrocarbon consisting of two fused cycloheptatriene rings.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use heptalene where its definition matches the intended context.
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