かくぶんれつ 核分裂 Common word Wanikani level 45 Play audio LinksSentence search for 核分裂Sentence search for かくぶんれつKanji details for 核, 分 and 裂Edit in JMdict Noun1. nuclear fissionNoun2. karyokinesis (division of a cell nucleus during mitosis or meiosis) Discussions Log in to talk about this word.