核子反應器 hézǐfǎnyìngqì nuclear reactor Origin Definitions Defs Strokes Stroke Words Sentences Sents 核子反应 核子反應 hézǐfǎnyìng nuclear reaction Process in which particles interact with an atomic nucleus to change its state or structure, such as nuclear fission or fusion, often releasing significant energy. Also called 核反应 héfǎnyìng.器 qì noun utensil device; tool; utensil; ware