thulium
thulium[ˈθ(j)uːlɪəm]noun- [mass noun]the chemical element of atomic number 69, a soft silvery-white metal of the lanthanide series(Symbol: Tm)
(化学元素)铥((符号: Tm))
语源- late 19th cent.: modern Latin, from Latin Thule (see sense 1 of Thule), from Greek Thoulē, of unknown origin
考试词汇表