資料來源 : pyDict

釷土; 釷土; 氧化釷; 二氧化釷

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Thoria \Tho"ri*a\, n. [NL. See {Thorite}.] (Chem.)
   A rare white earthy substance, consisting of the oxide of
   thorium; -- formerly called also {thorina}.