重じゅう水すい素そじゅうすいそFreq.FrequencyTop 100,000じ字FuriganaMeanings1noundeuterium; heavy hydrogenchemistry›Chemistry term for the stable hydrogen isotope with one proton and one neutron. Often contrasted with 軽水素 (protium) and 三重水素 (tritium).重じゅう水すい素
