upsilon +(Greek: the twentieth letter of the Greek alphabet)upsiloid
Shaped like the letter U or V.
upsilon
1. The 20th letter of the Greek alphabet, represented in the English alphabet as "y" or "u".
2. In physics, any of several ephemeral particles whose mass is ten times that of a proton. This letter has the sound of French u, Latin and Old English y; and it is transliterated in English as u or y. If there are any numbers below, use them to see other pages in this unit.Back to Index | Search Box | Main Index The Main-Word Info pageThe + sign at the end of a unit title means all of the words in that unit have definitions.Directory of special content and topicsDo you want to help to make this dictionary bigger and better?
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