What does 核分裂 mean?
核分裂 is a Japanese noun meaning “nuclear fission” in English. It can also be translated as “karyokinesis (division of a cell nucleus during mitosis or meiosis)” depending on context. It is written as 核分裂 in kanji, かくぶんれつ in hiragana, and kakubunretsu in romaji. This word is part of JLPT N2 vocabulary.