hemin Meaning, Definition & Usage

noun a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood
protohemin.

Gr. blood.

(Physiol. Chem.) A substance, in the form of reddish brown, microscopic, prismatic crystals, formed from dried blood by the action of strong acetic acid and common salt; -- called also Teichmann's crystals. Chemically, it is a hydrochloride of hematin. ✍ The obtaining of these small crystals, from old blood clots or suspected blood stains, constitutes one of the best evidences of the presence of blood.