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2 definitions found

From: DICT.TW English-Chinese Dictionary 英漢字典

 tho·ria /ˈθoriə, ˈθɔr-/
 釷土; 釷土; 氧化釷; 二氧化釷

From: Webster's Revised Unabridged Dictionary (1913)

 Tho·ri·a n.  Chem. A rare white earthy substance, consisting of the oxide of thorium; -- formerly called also thorina.