单词 | yttrium |
释义 | yttrium/ˈɪtrɪəm![]() noun [mass noun] The chemical element of atomic number 39, a greyish-white metal generally included among the rare earth elements. (Symbol: Y) Among various radionuclides, yttrium is of particular importance due to its chemical and nuclear characteristics....
OriginEarly 19th century: modern Latin, from Ytterby (see ytterbium). |
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