核子反应 hézǐfǎnyìng nuclear reaction Origin Definitions Defs Strokes Stroke Words Sentences Sents 核子反应器 hézǐfǎnyìngqì nuclear reactor device used to initiate and control a self-sustained nuclear chain reaction核子反应炉 hézǐfǎnyìnglú nuclear reactor A device used to initiate and control a nuclear fission or fusion reaction in order to generate energy.