English Dictionary

Studying English?

Watch tv shows, play games, become fluent in English with Yabla ... Try Free For 15 Days Learn More
Watch example usage of "upsilon"
Print (save as pdf)
upsilon
WIKTIONARY
upsilon
Noun
  • The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek.
  • (particle physics) An upsilon meson, or bottomonium.