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/ˈpɔːfɪɹɪn/ · noun
(organic chemistry) Any of a class of heterocyclic compounds containing pyrrole rings arranged in a square or other similar shape; they are important in biochemistry in a form with a metal atom in the central cavity (hemoglobin with iron, chlorophyll with magnesium, etc.)..
Use porphyrin when its meaning, tone and grammar fit the full sentence. A synonym is not always a direct replacement.
Porphyrin means (organic chemistry) Any of a class of heterocyclic compounds containing pyrrole rings arranged in a square or other similar shape; they are important in biochemistry in a form with a metal atom in the central cavity (hemoglobin with iron, chlorophyll with magnesium, etc.)..
The closest synonym depends on the sentence and intended sense.
The opposite depends on the specific sense.
Use porphyrin where its definition matches the intended context.
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