yttrium

yttrium
[ˈɪtrɪəm]
noun
  1. [mass noun]the chemical element of atomic number 39, a greyish-white metal generally included among the rare-earth elements(Symbol: Y)
    钇(符号：Y)
  2. Yttrium is usually included among the rare earth metals. Yttrium compounds are used to make red phosphors for colour television tubes. The metal itself is used in some alloys. Some mixed oxides of yttrium, copper, and barium are superconducting at relatively high temperatures
语源
  1. early 19th cent.: modern Latin, from Ytterby (see ytterbium)
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