[ hee-min ]
/ ˈhi mɪn /

noun Biochemistry.

the typical, microscopic reddish-brown crystals, C34H32N4O4FeCl, resulting when a sodium chloride crystal, a drop of glacial acetic acid, and some blood are heated on a slide: used to indicate the presence of blood.

Origin of hemin

First recorded in 1950–55; hem- + -in2
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for hemin

  • When cool, replace the acid with water, and examine for hemin crystals with two-thirds and one-sixth objectives.

    A Manual of Clinical Diagnosis|James Campbell Todd

Medicine definitions for hemin


[ hēmĭn ]


The reddish-brown crystalline chloride of heme produced when hemoglobin reacts with certain reagents in a test for the presence of blood.hematin chloride
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.