Englishnuclear isomernounMeaningAny of two or more atomic nuclei with the same mass number and atomic number but with different radioactive propertiesRelated wordsisomer(English)isotope(English)isomerism(English)isotone(English)isobar(English)nuclide(English)metastable isomer(English)radioisotope(English)SourcesDictionaryAPI.dev English dictionary data