核かく分ぶん裂れつ生せい成せい物ぶつかくぶんれつせいせいぶつMeanings1nounfission productTechnical term in nuclear physics and engineering for the nuclides produced by nuclear fission.核かく分ぶん裂れつ生せい成せい物ぶつには放ほう射しゃ性せいのものも含ふくまれる。Fission products include radioactive ones.