The Collaborative International Dictionary
Haematoin
Haematoin \H[ae]*mat"o*in\ (h[-e]*m[a^]t"[-o]*[i^]n), n. [H[ae]mato- + -in.] (Physiol. Chem.) A substance formed from the hematin of blood, by removal of the iron through the action of concentrated sulphuric acid. Two like bodies, called respectively h[ae]matoporphyrin and h[ae]matolin, are formed in a similar manner.
Wiktionary
haematoin
n. (context biochemistry English) A substance formed from the haematin of blood, by removal of the iron through the action of concentrated sulphuric acid.