thorium
/ˈθɔːriəm/
构词拆解
- -ium
- (chemistry) Used to form the names of metal elements, after the style of early-named elements, as well as the isotopes of hydrogen. · (chemistry) Used to form the temporary systematic element name of a metallic or nonmetallic element which is postulated to exist, or which has been newly synthesized and has not yet been assigned a permanent name.
词源说明
释义
名词noun
- 1(chemistry) A chemical element (symbol Th) with atomic number 90. A weakly radioactive, malleable, moderately hard silvery metal that tarnishes black when exposed to air.