hematin

noun

he·ma·tin ˈhē-mə-tən

: a brownish-black or bluish-black derivative C₃₄H₃₃N₄O₅Fe of oxidized heme

also : any of several similar compounds

Word History

First Known Use

1845, in the meaning defined above

Time Traveler

The first known use of hematin was in 1845

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Browse Nearby Words

hematid

hematin

hematinic

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Cite this Entry

Style

“Hematin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hematin. Accessed 3 Nov. 2025.

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Medical Definition

hematin

noun

he·ma·tin

variants or chiefly British haematin

ˈhē-mət-ən

1

: a brownish black or bluish black derivative C₃₄H₃₃N₄O₅Fe of oxidized heme containing iron with a valence of three

also : any of several similar compounds

2

: heme

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