See Also: mesothorium(medicine)
mesothorium(dictionary)

mesothorium (iou)



mesothorium noun. E20.
[from MESO- + THORIUM.]
Nuclear Physics. Either of two radioactive nuclides produced during the decay of thorium, radium 228 (mesothorium I), produced by -decay of thorium 232, and actinium 228 (mesothorium II), produced by -decay of mesothorium I.