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[en-doh-thur-mik] /ˌɛn doʊˈθɜr mɪk/
Chemistry. noting or pertaining to a chemical change that is accompanied by an absorption of heat (opposed to exothermic).
Zoology, warm-blooded.
Also, endothermal
[en-doh-thur-muh l] /ˌɛn doʊˈθɜr məl/ (Show IPA)
Origin of endothermic
< French endothermique (1879); see endo-, -therm, -ic
Related forms
endothermically, adverb
endothermy, endothermism, noun Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for endothermic
  • Interesting to watch engineering involved in using sunlight directly for this endothermic reaction.
  • When you add a salt to water and the container feels cold, yes, an endothermic reaction is taking place.
  • Dilution of ammonium chloride is an example of an endothermic reaction.
  • The ionization reaction is endothermic, and the attachment reaction is slightly exothermic.
  • So far all the reactions are overwhelmingly endothermic, except the electron attachment.
  • Both endothermic reaction and thermal conductivity mechanisms are acting to reduce the temperature beneath the bubbles.
  • All chemical reactions are either endothermic or exothermic.
British Dictionary definitions for endothermic


(of a chemical reaction or compound) occurring or formed with the absorption of heat Compare exothermic, endoergic
Derived Forms
endothermically, adverb
endothermism, 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 endothermic

1884, from French endothermique (1879); see endo- + thermal.

Online Etymology Dictionary, © 2010 Douglas Harper
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endothermic in Medicine

endothermic en·do·ther·mic (ěn'dō-thûr'mĭk) or en·do·ther·mal (-məl)

  1. Of or relating to a chemical reaction during which there is absorption of heat.

  2. Of or relating to an endotherm; warm-blooded.

en'do·ther'my 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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endothermic in Science
  1. Relating to a chemical reaction that absorbs heat. Compare exothermic.

  2. Warm-blooded.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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