porphyrinyoudaoicibaDictYouDict[porphyrin 词源字典]
"Any of a class of pigments (including haem and chlorophyll) whose molecules contain a flat ring of four linked heterocyclic groups, sometimes with a central metal atom", Early 20th century: from Greek porphura 'purple' + -in1.[porphyrin etymology, porphyrin origin, 英语词源]