单词 | thorianite |
释义 | thorianite /thawr"ee euh nuyt', thohr"-/, n. a rare mineral, mainly thoria, ThO2, but also containing uranium, cerium, and other rare-earth metals, occurring in small, black, cubic crystals: notable for its radioactivity and used as a minor source of thorium. [1900-05; thorian (THORI(A) + -AN) + -ITE1] |
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