noun Etymology: International Scientific Vocabulary, from Greek porphyra purple Date: 1910 any of various compounds with a macrocyclic structure that consists essentially of four pyrrole rings joined by four =CH– groups
PORPHYRIN
Meaning of PORPHYRIN in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012