exothermic

The definition of exothermic is a process or chemical reaction characterized by or causing the liberation or release of heat.

(adjective)

Combustion where heat is released is an example of an exothermic reaction.

See exothermic in Webster's New World College Dictionary

adjective

designating or of a chemical change in which there is a liberation of heat, as in combustion

Origin: exo- + thermic

See exothermic in American Heritage Dictionary 4

adjective

Releasing heat: an exothermic reaction.

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