exothermic
adjective/ˌeksəʊˈθɜːmɪk/
/ˌeksəʊˈθɜːrmɪk/
(chemistry)- (of a chemical reaction) producing heat compare endothermicWord Originlate 19th cent.: from French exothermique.
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exothermic
Definition of exothermic adjective from the Oxford Advanced Learner's Dictionary