Haematoin /(hē̇*măt"ō̇*ĭn)/

Hae·mat·o·in

Haematoin

n.
  1. 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 haematoporphyrin and haematolin, are formed in a similar manner. (Physiol. Chem.)