核かく分ぶん裂れつ物ぶっ質しつMeaningsNoun1. fissionable materialsKanji used核nucleus分part裂split物thing質qualityComposed of核かく分ぶん裂れつnuclear fission; karyokinesis (division of a cell nucleus during mitosis or meiosis)Noun物ぶっ質しつmaterial; substance; matterNoun