Heme

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This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

The American Heritage® Dictionary of the English Language, 4th Edition
  • n. The deep red, nonprotein, ferrous component of hemoglobin, C34H32FeN4O4.
  • Wiktionary, Creative Commons Attribution/Share-Alike License
  • n. The component of hemoglobin (and other hemoproteins) responsible for binding oxygen, consists of an iron ion that binds oxygen and a porphyrin ring that binds the globin molecules; one molecule binds one molecule of oxygen.
  • WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
  • n. a complex red organic pigment containing iron and other atoms to which oxygen binds
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    pigment   
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