单词 | thulium |
释义 | 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) Each segment contains small amounts of ions of relatively rare metals, such as dysprosium, thulium, and cerium, which fluoresce in different colors....
OriginLate 19th century: modern Latin, from Latin Thule (see Thule (sense 1)), from Greek Thoulē, of unknown origin. |
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