English Explanatory Dictionary

mesothorium

English dictionary entry

Meanings

noun
  1. Certain members of the decay chain of thorium, mainly isotopes of radium and actinium

Word forms

mesothorium mesothoriums

Etymology

From meso- + thorium. Probably so-called because these two isotopes (²²⁸Ra and ²²⁸Ac) are, in the decay chain, intermediate between normal thorium (²³²Th) and radiothorium (²²⁸Th).

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