mesothorium

About 0.02 uses per million words.

Meaning

1. noun Certain members of the decay chain of thorium, mainly isotopes of radium and actinium. Mesothorium I is radium-228. Mesothorium II is actinium-228.

Similar words

thorium emanation thoria thorium thorotrast thorinum thorite ionium radiothulium thorin thorianite

Often followed by

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