Definition of radionuclide in US English:



  • A radioactive nuclide.

    • ‘This is a partial list of radionuclides that decay by positron emission and have been used in biomedical imaging studies.’
    • ‘The impact of the radiation leakage was also relatively limited since most of the initial release of radioactive components was of radionuclides with relatively short half-lives.’
    • ‘If this occurred at the end of the reactor cycle, the fission radionuclides would generate about 4 percent of the total thermal power of a working reactor.’
    • ‘Gamma radiation from medically useful radionuclides is substantially attenuated by 1 to 2 inches of lead.’
    • ‘Alpha emitting radionuclides emit alpha particles, each consisting of 2 protons and 2 neutrons.’