This shows grade level based on the word's complexity.
upsilon
[ yoop-suh-lon, -luhn, uhp-; especially British yoop-sahy-luhn ]
/ ˈyup səˌlɒn, -lən, ˈʌp-; especially British yupˈsaɪ lən /
Save This Word!
This shows grade level based on the word's complexity.
noun
the 20th letter of the Greek alphabet (Υ, υ).
the vowel sound represented by this letter.
Also called upsilon particle. Physics. any of a family of heavy, short-lived, neutral mesons that are composed of a bottom quark and its antiquark. Symbol: Υ, υ
QUIZ
CAN YOU ANSWER THESE COMMON GRAMMAR DEBATES?
There are grammar debates that never die; and the ones highlighted in the questions in this quiz are sure to rile everyone up once again. Do you know how to answer the questions that cause some of the greatest grammar debates?
Question 1 of 7
Which sentence is correct?
Origin of upsilon
First recorded in 1615–25; from Late Greek ŷ psīlón, literally, “simple u” (to distinguish it from the digraph oi, pronounced the same in Late Greek )
Words nearby upsilon
upside, upside down, upside-down cake, upsides, upside the head, upsilon, upsilon particle, upsize, upskill, upspin, upspring
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use upsilon in a sentence
British Dictionary definitions for upsilon
upsilon
/ (ˈʌpsɪˌlɒn, juːpˈsaɪlən) /
noun
the 20th letter in the Greek alphabet (Υ, υ), a vowel, transliterated as y or u
Word Origin for upsilon
C17: from Medieval Greek u psilon simple u, name adopted for graphic u to avoid confusion with graphic oi, since pronunciation was the same for both in Late Greek
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012