Editing Upsilon (section)

{{short description|Twentieth letter in the Greek alphabet}}
{{hatnote group|
{{about-distinguish|the Greek upsilon|Epsilon|ʊ|Y}}
{{other uses|Upsilon (disambiguation)|Ypsilon (disambiguation)}}
}}
{{pp-pc}}
{{Greek Alphabet|letter=upsilon}}

'''Upsilon''' ({{IPAc-en|US|ˈ|ʌ|p|s|ɪ|ˌ|l|ɒ|n|,_|ˈ|(|j|)|uː|p|-|,_|-|l|ən}}, {{IPAc-en|UK|(|j|)|uː|p|ˈ|s|aɪ|l|ən|,_|ʊ|p|-|,_|-|l|ɒ|n|audio=LL-Q1860 (eng)-Flame, not lame-Upsilon.wav}};<ref name=Chambers>{{cite encyclopedia |title=upsilon |encyclopedia=[[Chambers Dictionary]] |publisher=[[Chambers (publisher)|Chambers]] |year=2003 |edition=9th |isbn=0-550-10105-5}}</ref><ref name=Collins>{{cite encyclopedia |title=upsilon |encyclopedia=[[Collins English Dictionary]] |publisher=[[HarperCollins]] |year=2018 |edition=13th |isbn=978-0-008-28437-4}}</ref>{{refn|{{cite Merriam-Webster|access-date=2016-01-22|Upsilon}}}}{{refn|{{Cite dictionary |url=http://www.lexico.com/definition/Upsilon |archive-url=https://web.archive.org/web/20191221151730/https://www.lexico.com/definition/upsilon |url-status=dead |archive-date=2019-12-21 |title=Upsilon |dictionary=[[Lexico]] UK English Dictionary |publisher=[[Oxford University Press]]}} }}{{refn|{{cite Dictionary.com|access-date=2016-01-22|upsilon}}}}<ref>{{cite OED|upsilon}}</ref> uppercase '''Υ''', lowercase '''υ'''; {{langx|el|{{linktext|ύψιλον}}}} ''ýpsilon'' {{IPA|el|ˈipsilon|}}) or '''ypsilon''' {{IPAc-en|I|p|-}}<ref name="Chambers" /> is the twentieth letter of the [[Greek alphabet]].  In the system of [[Greek numerals]], {{langx|grc|Υʹ|label=none}} has a value of 400. It is derived from the [[phoenician alphabet|Phoenician]] [[Waw (letter)|waw]] [[Image:Phoenician waw.svg|20px]].

[[File:NAMA Alphabet grec.jpg|thumb|The Greek alphabet on a [[black figure]] vessel, with a V-shaped upsilon]]