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[gloo-tuh-thahy-ohn] /ˌglu təˈθaɪ oʊn/
noun, Biochemistry
a crystalline, water-soluble peptide of glutamic acid, cysteine, and glycine, C 10 H 17 N 3 O 6 S, found in blood and in animal and plant tissues, and important in tissue oxidations and in the activation of some enzymes.
Origin of glutathione
1920-25; gluta(mic acid) + thi- + -one Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for glutathione


/ˌɡluːtəˈθaɪəʊn; -θaɪˈəʊn/
(biochem) a tripeptide consisting of glutamic acid, cysteine, and glycine: important in biological oxidations and the activation of some enzymes. Formula: C10H17N3O6S
Word Origin
C20: from gluta(mic acid) + thi- + -one
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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glutathione in Medicine

glutathione glu·ta·thi·one (glōō'tə-thī'ōn')
A tripeptide of the amino acids glycine, cystine, and glutamic acid occurring widely in plant and animal tissues and forming reduced and oxidized forms important in biological oxidation-reduction reactions.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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glutathione in Science
A polypeptide consisting of glycine, cysteine, and glutamic acid that occurs widely in plant and animal tissues. It is important in cellular respiration in both plants and animals, and serves as a cofactor for many enzymes. It is a major protective mechanism against oxidative stress. For example, it protects red blood cells from hydrogen peroxide, a toxic byproduct of certain metabolic reactions.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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