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.
[1913 Webster]