# haematoin

> English word · Noun

## Definitions
1. A substance formed from the haematin of blood, by removal of the iron through the action of concentrated sulphuric acid.

## Etymology
From haemato- + -in.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/haematoin