Upsilon - Wikipedia In some languages, including German and Portuguese, the name upsilon (Ypsilon in German, ípsilon in Portuguese) is used to refer to the Latin letter Y as well as the Greek letter
Upsilon Symbol in Greek Alphabet Υ υ Upsilon (uppercase Υ, lowercase υ) is the 20th letter of the Greek alphabet In the Greek number system, this letter was taken as the symbol of the number 400
Upsilon Unraveled: Unleashing the Universal U Dive into the captivating odyssey of Upsilon, the 20th letter of the Greek alphabet, from its origins in ancient scripts to its role in the forefront of modern science and technology
upsilon - Wiktionary, the free dictionary Noun [edit] upsilon (plural upsilons or upsila) The twentieth letter of Classical and Modern Greek; the twenty-second letter of Old and Ancient Greek (particle physics) An upsilon meson, or bottomonium