radiothorium
American
[ray-dee-oh-thawr-ee-uhm, -thohr-]
/ ˌreɪ di oʊˈθɔr i əm, -ˈθoʊr- /
noun
Chemistry.
Etymology
Origin of radiothorium
From New Latin, dating back to 1920–25; see origin at radio-, thorium
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