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[en-doh-tok-sin] /ˌɛn doʊˈtɒk sɪn/
noun, Biochemistry
the toxic protoplasm liberated when a microorganism dies and disintegrates, as in Eberthella typhi, the causative agent of typhoid fever.
Compare exotoxin.
1900-05; endo- + toxin
Related forms
endotoxic, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for endotoxin


a toxin contained within the protoplasm of an organism, esp a bacterium, and liberated only at death
Derived Forms
endotoxic, adjective
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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endotoxin in Medicine

endotoxin en·do·tox·in (ěn'dō-tŏk'sən)
A toxin that forms an integral part of the cell wall of certain bacteria and is only released upon destruction of the bacterial cell. Endotoxins are less potent and less specific than most exotoxins and do not form toxoids. Also called intracellular toxin.

en'do·tox'ic adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Encyclopedia Article for endotoxin

toxic substance bound to the bacterial cell wall and released when the bacterium ruptures or disintegrates. Endotoxins consist of lipopolysaccharide and lipoprotein complexes. The protein component determines its foreign (antigenic) nature; the polysaccharide component determines the antibody type that can react with the endotoxin molecule to produce an immune reaction. Endotoxins are rarely fatal, although they often cause fever.

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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