First Known Use: 1905
Dictionary
radiothorium
noun ra·dio·tho·ri·um \-ˈthȯr-ē-əm\
Definition of RADIOTHORIUM
: a radioactive isotope of thorium with the mass number 228
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Origin of RADIOTHORIUM
New Latin
Medical Dictionary
radiothorium
noun ra·dio·tho·ri·um \-ˈthōr-ē-əm, -ˈthȯr-\
Medical Definition of RADIOTHORIUM
: a radioactive isotope of thorium with the mass number 228
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