radiothorium

radiothorium

[rey-dee-oh-thawr-ee-uhm, -thohr-]
noun Chemistry.
a disintegration product of thorium.

Origin:
1920–25; < Neo-Latin; see radio-, thorium

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WordNet
radiothorium

noun
radioactive isotope of thorium with mass number 228 [syn: thorium-228
WordNet® 3.0, © 2006 by Princeton University.
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