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English Dictionary

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 Y Y /ˈwaɪ/

noun

  1. The 25th letter of the Roman alphabet  ( wye , Y )
    the 25th letter of the Roman alphabet
  2. A silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys  ( atomic number 39 , Y , yttrium )
    a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys