(chemistry, of a reaction) That releases energy in the form of heat. / (chemistry, of a compound) That releases heat during its formation, and absorbs it during its decomposition.

(chemistry, physics, uncountable) The quality or state of being exothermic. / (countable) The release of heat during an exothermic reaction.

In an exothermic manner

plural of exothermicity

In an exothermal manner

(chemistry) Any exothermic compound

exothermic

plural of exotherm

exothermic