mesothorium

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noun

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

Scrabble 18
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Meanings

nounmesothorium (plural mesothoriums)

plural mesothoriums

  1. natural sciencesCertain members of the decay chain of thorium, mainly isotopes of radium and actinium

Origin

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).

Full word history & related roots →

Translations

Italian mesotorio
  • mesotorioproduct of radioactive decay of thorium
Cite this entry
APA

mesothorium. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/mesothorium

MLA

“mesothorium.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/mesothorium. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “mesothorium,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/mesothorium.

Source: mesothorium on Wiktionary, CC BY-SA 4.0.