| n. | 1. | (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. |
| Noun | 1. | hemin - a reddish-brown chloride of heme; produced from hemoglobin in laboratory tests for the presence of blood Synonyms: protohemin |