Dictionary.com
Thesaurus.com

upsilon

American  
[yoop-suh-lon, -luhn, uhp-, yoop-sahy-luhn] / ˈjup səˌlɒn, -lən, ˈʌp-, jupˈsaɪ lən /

noun

  1. the 20th letter of the Greek alphabet (Υ, υ).

  2. the vowel sound represented by this letter.

  3. Also called upsilon particlePhysics. any of a family of heavy, short-lived, neutral mesons that are composed of a bottom quark and its antiquark. Υ, υ


upsilon British  
/ ˈʌpsɪˌlɒn, juːpˈsaɪlən /

noun

  1. the 20th letter in the Greek alphabet (Υ, υ), a vowel, transliterated as y or u

"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

Etymology

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 )

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

A Delta Upsilon fraternity member was injured when he fell from a fire escape at the Sigma Phi Epsilon house in September 2015.

From Seattle Times • Nov. 13, 2019

Protesters occupied the Phi Psi fraternity house and surrounding area for four days, calling on the school administration to dissolve the chapter and the college’s other fraternity, Delta Upsilon.

From Fox News • May 1, 2019

Students have said they will not be happy until the college shuts down both Phi Psi and Delta Upsilon.

From Slate • Apr. 30, 2019

Delta Upsilon fraternity told Philadelphia Magazine that it read the documents "with total revulsion" and said they "do not reflect the values" of the group.

From BBC • Apr. 30, 2019

"After the I.R.S., my gambling debts, the Sierra Club, and Psi Upsilon, you shall have everything."

From Michelangelo's Shoulder by Wetterau, John Moncure

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "upsilon" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com