原げん子し核かく分ぶん裂れつげんしかくぶんれつMeanings1nounnuclear fissionphysicsTechnical term in physics for the splitting of an atomic nucleus.原げん子し核かく分ぶん裂れつは原げん子し力りょく発はつ電でんの基き本ほん原げん理りです。Nuclear fission is the basic principle of nuclear power generation.