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 (ŭp′sə-lŏn′, yo͞op′-)
The 20th letter of the Greek alphabet. See Table at alphabet.

[Late Greek ū psīlon, simple u (from the fact that oi was given the same pronunciation in Late Greek as u) : ū, hū, the letter U + psīlon, neuter of psīlos, simple (written with one letter as opposed to two).]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(ˈʌpsɪˌlɒn; juːpˈsaɪlən)
(Letters of the Alphabet (Foreign)) the 20th letter in the Greek alphabet (Υ, υ), a vowel, transliterated as y or u
[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 and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˈyup səˌlɒn, -lən, ˈʌp-; esp. Brit. yupˈsaɪ lən)

1. the 20th letter of the Greek alphabet (Y, υ).
2. Also called up′silon par`ticle. any of a family of heavy, short-lived, neutral mesons that are composed of a bottom quark and its antiquark. Symbol:Y, υ
[1615–25; < Late Greek ŷ psīlón literally, simple u (to distinguish it from the diagraph oi, pronounced the same in Late Greek]
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.upsilon - the 20th letter of the Greek alphabetupsilon - the 20th letter of the Greek alphabet
Greek alphabet - the alphabet used by ancient Greeks
alphabetic character, letter of the alphabet, letter - the conventional characters of the alphabet used to represent speech; "his grandmother taught him his letters"
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
The vehicle features a new front bumper design, new lip splitter, air intakes with an Ypsilon design, twin exhausts positioned higher at the rear than those seen on its earlier version race car like diffusers, an integrated ducktail spoiler, and a new 8.4-inch touchscreen infotainment system with Apple CarPlay.
Effects of fenoxycarb, juvenile hormone mimetic on female sexual behavior of the black cutworm, Agrotis ypsilon (Lepidoptera: Noctuidae).
Se conocio de la chinche Oebalus ypsilon griseus (DeGeer, 1773) en cultivos de arroz (Vecchio 1993) y B.
"Thanks to its leading expertise, quality products and ability to tailor solutions to specific demands, Elmico has worked on a long list of important projects including the Ypsilon bridge, VEAS wastewater treatment plant and the Nordhue antennae building," he added.
BACK in 2011, Chrysler decided on a shortcut to credibility in the small car sector by borrowing and re-badging Lancia's stylish little Ypsilon, a car that in Europe, had proved equally popular with both Citycar and Supermini buyers.
Most disappointing was the Lancia Ypsilon, which achieved just two stars, although this model is no longer sold in the UK.
The Lancia Ypsilon has been awarded a two-star rating in the EuroNCAP crash test - the only car tested in 2015 to offer a rating below three stars.
CHEVROLET Chevrolet 3rd Quarter offers: Chevrolet Spark: On-theroad price from PS9,295.00 Chevrolet Trax: On-theroad price from PS18,300.00 CHRYSLER Chrysler 3rd Quarter offers: Chrysler Ypsilon from PS12,795 otr Chrysler Grand Voyager from PS28,310 otr Chrysler 300C from PS30,020 otr DACIA Dacia 3rd Quarter offers: Dacia New Duster Ambiance DCi 110 4x2 48 monthly payments of PS179 Customer deposit PS563 Cash price PS11,995 Dacia Logan MCV Ambiance 1.2 16V 75 48 monthly payments of PS99 Customer deposit PS1,065 Cash price PS7,795 Dacia Sandero Ambiance 1.2 16V 75 48 monthly payments of PS89 Customer deposit PS748 Cash price PS6,795 Dacia Sandero Stepway Ambiance TCe 90 48 monthly payments of PS99 Customer deposit PS1,561 Cash price PS8,395
The first result from this somewhat unlikely union was the small Ypsilon B-segment family hatchback, which showed Lancia were very much alive and kicking.
O experimento foi conduzido em um pomar de pessegueiro da cultivar 'Chimarrita', enxertado sobre porta-enxerto 'Capdeboscq', na densidade de 1.666 plantas por hectare (1,5m entre plantas e 4m entre linhas) e conduzido em sistema Ypsilon, no municipio de Bento Goncalves (RS) (latitude 29[degrees]9'54.50"S; longitude 51[degrees]32'3.87"O).