核反应堆 héfǎnyìngduī nuclear reactor Origin Definitions Defs Strokes Stroke Words Sentences Sents 核 hé noun nuclear (bound form) relating to the nucleus of an atom; nuclear power or weaponry反应 反應 fǎnyìng nounverb chemical reaction a process in which substances undergo chemical or physical change堆 duī noun pile a heap or stack of things