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

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First Known Use

1925, in the meaning defined above

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The first known use of protoporphyrin was in 1925

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“Protoporphyrin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/protoporphyrin. Accessed 31 Oct. 2025.

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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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protoporphyrin

noun

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