exothermic

or ex·o·ther·mal

[ ek-soh-thur-mik ]
/ ˌɛk soʊˈθɜr mɪk /

adjective Chemistry.

noting or pertaining to a chemical change that is accompanied by a liberation of heat (opposed to endothermic).

QUIZZES

HEED THE VOX POPULI, AND TAKE THIS WORD OF THE DAY QUIZ!

Test your memory on these verbal firecrackers from the week of June 29 to July 5!
Question 1 of 7
anchorite

Origin of exothermic

First recorded in 1880–85; exo- + thermic

OTHER WORDS FROM exothermic

ex·o·ther·mi·cal·ly, ex·o·ther·mal·ly, adverbex·o·ther·mic·i·ty [ek-soh-ther-mis-i-tee] /ˌɛk soʊ θərˈmɪs ɪ ti/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for exothermicity

exothermic

exothermal

/ (ˌɛksəʊˈθɜːmɪk) /

adjective

(of a chemical reaction or compound) occurring or formed with the evolution of heatCompare endothermic, exoergic

Derived forms of exothermic

exothermically or exothermally, adverb
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

Medical definitions for exothermicity

exothermic
[ ĕk′sō-thûrmĭk ]

adj.

Of or relating to a chemical reaction during which heat is released.
Of or relating to the external warmth of the body.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Scientific definitions for exothermicity

exothermic
[ ĕk′sō-thûrmĭk ]

Relating to a chemical reaction that releases heat. Compare endothermic.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.