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[en-doj-uh-nuh s] /ɛnˈdɒdʒ ə nəs/
proceeding from within; derived internally.
Biology. growing or developing from within; originating within.
Pathology. (of a disease) resulting from conditions within the organism rather than externally caused.
Biochemistry. pertaining to the metabolism of nitrogenous elements of cells and tissues.
Geology, endogenetic.
Origin of endogenous
1825-35; endo- + -genous
Related forms
[en-doh-juh-nis-i-tee] /ˌɛn doʊ dʒəˈnɪs ɪ ti/ (Show IPA),
endogenously, adverb
Can be confused
endogenous, indigenous. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for endogenous
  • Some of it is exogenous to the collective decisions of firms, some of it is endogenous.
  • The reason is almost certainly the effects of endogenous opioids, better known as endorphins.
  • No, because the maximum length of unemployment insurance is itself an endogenous variable.
  • They did so because someone has said that a true business cycle theory would be endogenous and not include money.
  • However, no amount of talking can treat a clinical or endogenous depression.
  • But if you then put it back to constant dark or dim light conditions, it immediately reverts to its endogenous time keeper.
  • endogenous purines are manufactured within human cells.
  • The viruses that scientists discovered in host genomes were of a particular sort, known as endogenous retroviruses.
  • In theory a cycle of extinctions and clade radiations could be due to endogenous processes.
  • In other words, the parameter is not purely endogenous.
British Dictionary definitions for endogenous


(biology) developing or originating within an organism or part of an organism: endogenous rhythms
having no apparent external cause: endogenous depression
Derived Forms
endogenously, adverb
endogeny, noun
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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Word Origin and History for endogenous

1830, from endo- "within" + -genous "producing."

Online Etymology Dictionary, © 2010 Douglas Harper
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endogenous in Medicine

endogenous en·dog·e·nous (ěn-dŏj'ə-nəs)

  1. Originating or produced within an organism, a tissue, or a cell.

  2. Caused by factors within the body. Used of a disease.

en·dog'e·nous·ly adv.
en·dog'e·ny n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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endogenous in Science
Originating or produced within an organism, tissue, or cell. Compare exogenous.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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