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1. Oxford Dictionary

   upsilon

   • IPA[(j)uːpˈsʌɪlən]

   英式

   • n.
     the twentieth letter of the Greek alphabet (Υ, υ), transliterated as ‘u’ or (chiefly in English words derived through Latin) as ‘y’.；the twentieth star in a constellation

   • noun: upsilon, plural noun: upsilons

2. • 釋義

   n.

   名詞

   • 1. the twentieth letter of the Greek alphabet (Υ, υ), transliterated as ‘u’ or (chiefly in English words derived through Latin) as ‘y’.
   • ▪ the twentieth star in a constellation Upsilon Scorpii
   • ▪ a meson thought to contain a b quark bound to its antiparticle, produced in particle accelerators.
3. • 更多解釋

   upsilon

   • IPA[ˈo͞opsəˌlän]

   美式

   • n.
     the twentieth letter of the Greek alphabet (Υ, υ), transliterated in the traditional Latin ...

   Oxford American Dictionary