(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.).

Of, pertaining to, or derived from a porphyrin.

plural of porphyrin

Alternative form of porphyrin

plural of porphyrine

(biochemistry) A reduced form of porphyrin that is an intermediate in the biosynthesis of heme

plural of porphyrinogen

(pathology) The presence of porphyrins in the urine

plural of porphyrinoid

Based on a porphyrin