Try Our Apps


Avoid these words. Seriously.


[heem] /him/
noun, Biochemistry.
a deep-red iron-containing blood pigment, C 34 H 32 N 4 O 4 Fe, obtained from hemoglobin.
Origin of heme
First recorded in 1920-25; shortened form of hematin Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
Cite This Source
Examples from the Web for heme
Historical Examples
  • heme instantly drew forth a hunting-knife, and cutting Fenwolf's bonds asunder, the latter started to his feet.

    Windsor Castle William Harrison Ainsworth
heme in Medicine

heme (hēm)
The deep red, oxygen-carrying, nonprotein, ferrous component of hemoglobin. Also called reduced hematin.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source
heme in Science
The deep red, nonprotein, iron-containing component of hemoglobin that carries oxygen. Heme is a porphyrin with an iron atom at its center. One of the free valence electrons of the iron atom of heme is bound to the hemoglobin molecule, while the other is available for binding to an oxygen atom. A hemoglobin molecule contains four hemes. Chemical formula: C34H32FeN4O4.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source

Word of the Day

Nearby words for heme

Word Value for heme

Scrabble Words With Friends