核かく分ぶん裂れつ生せい成せい物ぶつMeaningsNoun1. fission productKanji used核nucleus分part裂split生life成become物thingComposed of核かく分ぶん裂れつnuclear fission; karyokinesis (division of a cell nucleus during mitosis or meiosis)Noun生せい成せいcreation; generation; formation; derivationNoun物ぶつstock; productsNoun