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Pronunciation varies by accent · noun
(chemistry) A polycyclic aromatic hydrocarbon containing four fused benzene rings; first isolated from coal tar.
Use pyrene when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyrene means (chemistry) A polycyclic aromatic hydrocarbon containing four fused benzene rings; first isolated from coal tar.
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pyrene where its definition matches the intended context.
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