etioporphyrin

noun
etio·​por·​phy·​rin
variants: or chiefly British aetioporphyrin \ -​ˈpȯr-​fə-​rən How to pronounce aetioporphyrin (audio) \

Medical Definition of etioporphyrin

: any of four isomeric porphyrins C32H38N4 especially : a violet crystalline pigment occurring in nature (as in petroleum and coal) and formed by degradation of chlorophyll and of heme

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