upsilon
(noun) the 20th letter of the Greek alphabet
Source: WordNet® 3.1
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.
• (uncommon) ypsilon
• Poulins, pulsion, unspoil
Source: Wiktionary
Up"si*lon, n. [Gr. 'y^ psilo`n bare, mere, simple y.]
Definition: The 20th letter (U, u) of the Greek alphabet, a vowel having originally the sound of oo as in room, becoming before the 4th century b. c. that French u or Ger. ü. Its equivalent in English is u or y.
Source: Webster’s Unabridged Dictionary 1913 Edition
23 November 2024
(adjective) concerned primarily with theories or hypotheses rather than practical considerations; “theoretical science”
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