Dictionary

porphyrin

porphyrin

noun por·phy·rin \ˈpr-fə-rən\

Definition of PORPHYRIN

:  any of various compounds with a macrocyclic structure that consists essentially of four pyrrole rings joined by four =CH− groups; especially :  one (as chlorophyll or hemoglobin) containing a central metal atom and usually exhibiting biological activity

Origin of PORPHYRIN

International Scientific Vocabulary, from Greek porphyra purple
First Known Use: 1910

porphyrin

noun por·phy·rin \ˈpr-fə-rən\   (Medical Dictionary)

Medical Definition of PORPHYRIN

:  any of various compounds with a structure that consists essentially of four pyrrole rings joined by four =CH− groups; especially :  one (as chlorophyll or hemoglobin) containing a central metal atom and usually having biological activity

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