upsilon

A noun referring to the 20th letter of the Greek alphabet.

• 🇨🇳表示希腊字母表中第20个字母的专有名词。

1. Greek letter B2 formal

   The 20th letter of the Greek alphabet, written as Υ (uppercase) or υ (lowercase).

   • The symbol upsilon is used in physics to represent the upsilon meson.
   • In Greek numerals, upsilon has a value of 400.
   • The lowercase upsilon looks similar to the Latin letter 'u'.

   🇨🇳宇普西龙

• upsilons plural form
• upsilons' possessive plural form
• upsilon's possessive singular form