原げん子し核かく崩ほう壊かいげんしかくほうかいじ字FuriganaMeanings1nounnuclear decayrare termphysics›Rare physics term for the spontaneous transformation of an atomic nucleus. More commonly referred to as 放射性崩壊 (radioactive decay).See also: 放射性崩壊原げん子し核かく