The Collaborative International Dictionary of English v.0.48:

Haemol \H[ae]"mol\ (h[=e]"m[=o]l), n. [Gr. a"i^ma blood.]
   (Chem.)
   A dark brown powder containing iron, prepared by the action
   of zinc dust as a reducing agent upon the coloring matter of
   the blood, used medicinally as a hematinic.
   [Webster 1913 Suppl.]