放热反应 fàngrèfǎnyìng exothermic reaction Definitions Defs Origin Strokes Stroke Words Sentences Sents 放 fàng verb to set off to set off (fireworks); to fire (a gun); to emit (light or sound); to play (a movie or recording)热 熱 rè noun heat (physics) heat as a form of energy; thermal energy反应 反應 fǎnyìng nounverb chemical reaction a process in which substances undergo chemical or physical change
