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/ ˈpɪrɪˌdin/ · noun
(organic chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of five carbon atoms and a nitrogen atom; especially the simplest one, C₅H₅N..
Use pyridine when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Pyridine means (organic chemistry) Any of a class of aromatic heterocyclic compounds containing a ring of five carbon atoms and a nitrogen atom; especially the simplest one, C₅H₅N..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use pyridine where its definition matches the intended context.
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