protoporphyrin
noun
pro·to·por·phy·rin ˌprō-tō-ˈpȯr-f(ə-)rən 
: a purple porphyrin acid C34H34N4O4 obtained from hemin or heme by removal of bound iron
Word History
Etymology
International Scientific Vocabulary
First Known Use
1925, in the meaning defined above
Medical Definition
protoporphyrin
noun
pro·to·por·phy·rin ˌprōt-ō-ˈpȯr-f(ə-)rən
: a purple porphyrin acid C34H34N4O4 obtained from hemin or heme by removal of bound iron
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