en·​dog·​e·​nous | \ en-ˈdä-jə-nəs How to pronounce endogenous (audio) \

Definition of endogenous

1 : growing or produced by growth from deep tissue endogenous plant roots
2a : caused by factors inside the organism or system suffered from endogenous depression endogenous business cycles
b : produced or synthesized within the organism or system an endogenous hormone

Other Words from endogenous

endogenously adverb

Did you know?

When biologists need to make a distinction between things that are produced within a cell or organ and things that affect it from the outside, they use the terms endogenous and exogenous. It used to be thought, for instance, that mutations in cells always resulted from exogenous causes, until it was discovered that substances in the body, including those called oxidants, could cause them endogenously as well. "Circadian rhythms"—the regular cycles, roughly 24 hours in length, that plants, animals, and humans rely on to regulate their days—are endogenously generated and don't actually depend on the sun for their timing.

Examples of endogenous in a Sentence

Recent Examples on the Web But the research concerning endogenous testosterone, the kind that the body makes naturally, was less settled. Louisa Thomas, The New Yorker, 17 Mar. 2022 This stability seems endogenous rather than a mere reflection of federal aid. Andrew Stuttaford, National Review, 21 Nov. 2021 EVs are natural vesicles secreted by endogenous cells to protect and transport small RNAs across cells and biological barriers and therefore should be biocompatible with the host’s immune system. Chao Yan, Scientific American, 17 June 2020 Now, thanks to the work of Dr. George Church and his colleagues from Harvard Medical School, scientists can snip all 62 genes responsible for producing pig endogenous retroviruses. William A. Haseltine, Forbes, 1 Nov. 2021 Focusing on human endogenous retroviruses, or HERVs, Thakkar’s video explains how viruses are made from genes and a protein shell that need to replicate and create retroviruses in the human body. Allana Haynes, baltimoresun.com, 13 Oct. 2021 In Feilding’s view, the mystical experience is an endogenous state of mind which happens on rare occasions, much more often to children. Natan Ponieman, Forbes, 12 Oct. 2021 Indeed, a quantum computer attack could impair nearly 60% of total assets in the banking system due to bank runs and endogenous liquidity traps. Arthur Herman, Forbes, 26 May 2021 Whether the source of the shock is endogenous or exogenous is to a certain extent missing the point — a hit that massive would be catastrophic. Kevin A. Hassett, National Review, 21 Dec. 2020 See More

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'endogenous.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

First Known Use of endogenous

1830, in the meaning defined at sense 1

Learn More About endogenous

Time Traveler for endogenous

Time Traveler

The first known use of endogenous was in 1830

See more words from the same year

Dictionary Entries Near endogenous




See More Nearby Entries 

Statistics for endogenous

Cite this Entry

“Endogenous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endogenous. Accessed 22 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for endogenous


en·​dog·​e·​nous | \ en-ˈdäj-ə-nəs How to pronounce endogenous (audio) \
variants: also endogenic \ ˌen-​də-​ˈjen-​ik How to pronounce endogenous (audio) \

Medical Definition of endogenous

1 : growing from or on the inside endogenous spores
2 : caused by factors within the body or mind or arising from internal structural or functional causes endogenous malnutrition endogenous psychic depression
3 : relating to or produced by metabolic synthesis in the body endogenous opioids endogenous amino acids — compare exogenous

Other Words from endogenous

endogenously adverb

More from Merriam-Webster on endogenous

Britannica English: Translation of endogenous for Arabic Speakers


Test Your Vocabulary

Which Word Does Not Belong?

  • one green toy robot amidst many red toy robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!