- The definition of exothermic is a process or chemical reaction characterized by or causing the liberation or release of heat.
Combustion where heat is released is an example of an exothermic reaction.
exothermic definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
designating or of a chemical change in which there is a liberation of heat, as in combustion
Origin: exo- plush thermic
exothermic definition by American Heritage Dictionary
The American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Releasing heat: an exothermic reaction.
- exˌo·therˈmi·cal·ly adverb
exothermic - Medical Definition
The American Heritage® Medical Dictionary Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
- Of or relating to a chemical reaction during which heat is released.
- Of or relating to the external warmth of the body.
exothermic - Science Definition
Relating to a chemical reaction that releases heat. Compare endothermic.