upsilon

U1P3S1I1L1O1N1
UK/ˈ(j)uːpsɪˌlɒn/UK/ˈ(j)ʊpsɪˌlɒn/UK/ˈʌpsɪˌlɒn/UK/(j)uːpˈsaɪlən/

noun

The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.

OriginAncient Greek ὖ ψιλόν →
Less commonScrabble 9
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Meanings

nounupsilon (plural upsilons or upsila)

plural upsilons · plural upsila · alternative uncommon ypsilon

  1. The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.
  2. particlenatural sciencesAn upsilon meson, or bottomonium.

Origin

  1. Ancient Greekὖ ψιλόν“simple Υ”
  2. Englishupsilon

From Ancient Greek ὖ ψιλόν (û psilón, “simple Υ”).

More words from Ancient Greek

Full word history & related roots →

Translations

Ancient Greek ὖ ψιλόν
  • ὖ ψιλόν (û psilón)letter of the Greek alphabet
Arabic أُبْسِلُون, أُبْسِيلُون
  • أُبْسِلُون (ʔubsilūn)letter of the Greek alphabet
  • أُبْسِيلُون (ʔubsilūn)letter of the Greek alphabet
Catalan ípsilon
  • ípsilonletter of the Greek alphabet
Chinese Mandarin 宇普西龍 /宇普西龙, 埃普西隆
  • 宇普西龍 /宇普西龙 (yǔpǔxīlóng)letter of the Greek alphabet
  • 埃普西隆 (āipǔxīlóng)letter of the Greek alphabet
Czech ypsilon
  • ypsilonletter of the Greek alphabet
Danish ypsilon
  • ypsilonletter of the Greek alphabet
Dutch upsilon, ypsilon
  • upsilonletter of the Greek alphabet
  • ypsilonletter of the Greek alphabet
Esperanto upsilono
  • upsilonoletter of the Greek alphabet
Estonian üpsilon
  • üpsilonletter of the Greek alphabet
Finnish ypsilon
  • ypsilonletter of the Greek alphabet
French upsilon
  • upsilonletter of the Greek alphabet
German Ypsilon
  • Ypsilonletter of the Greek alphabet
Greek ύψιλον
  • ύψιλον (ýpsilon)letter of the Greek alphabet
Hebrew אִיפְּסִילוֹן
  • אִיפְּסִילוֹן (ípsilon)letter of the Greek alphabet
Hungarian üpszilon
  • üpszilonletter of the Greek alphabet
Irish upsalón
  • upsalónletter of the Greek alphabet
Italian ipsilon
  • ipsilonletter of the Greek alphabet
Japanese ユプシロン, ウプシロン
  • ユプシロン (yupushiron)letter of the Greek alphabet
  • ウプシロン (upushiron)letter of the Greek alphabet
Korean 입실론
  • 입실론 (ipsillon)letter of the Greek alphabet
Malay upsilon
  • upsilonletter of the Greek alphabet
Portuguese ípsilon, hipsilo
  • ípsilonletter of the Greek alphabet
  • hipsiloletter of the Greek alphabet
  • ipsiloneletter of the Greek alphabet
  • ipsilãoletter of the Greek alphabet
Russian и́псилон
  • и́псилон (ípsilon)letter of the Greek alphabet
Slovak ypsilon
  • ypsilonletter of the Greek alphabet
Spanish ípsilon
  • ípsilonletter of the Greek alphabet
Swedish ypsilon
  • ypsilonletter of the Greek alphabet
Turkish ipsilon, üpsilon
  • ipsilonletter of the Greek alphabet
  • üpsilonletter of the Greek alphabet

Rhymes & wordplay

Anagrams

pulsionunspoil
Cite this entry
APA

upsilon. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/upsilon

MLA

“upsilon.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/upsilon. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “upsilon,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/upsilon.

Source: upsilon on Wiktionary, CC BY-SA 4.0.