upsilon: Meaning and Definition of
Pronunciation: (yp'su-lon", -lun, up'- esp. Brit. yp-sī'lun), [key]
- the 20th letter of the Greek alphabet (&Ugr;, &ugr;).
- the vowel sound represented by this letter.
- Also calledany of a family of heavy, short-lived, neutral mesons that are composed of a bottom quark and its antiquark. Symbol: &Ugr;, &ugr;
- upsilon (Thesaurus)