Letter of the Latin alphabet
Also known as Latin upsilon · inverted omega
9 statements · 11% with external sources · numbers in brackets are citations
1 identifiers linking Ʊ across the web's reference databases
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The letter Ʊ, called Latin upsilon or sometimes inverted omega, horseshoe u, or bucket, is a letter of the International Phonetic Alphabet used to transcribe a near-close near-back rounded vowel. Graphically, the lower case is a turned small-capital Greek letter omega (Ω) in many typefaces, and historically it derives from a small-capital Latin U (ᴜ), with the serifs exaggerated to make them more visible. However, Geoffrey Pullum interpreted it as an IPA variant of the Greek letter upsilon (υ) and called it Latin upsilon, the name that would be adopted by Unicode, though in IPA a letter closer to an actual Greek upsilon is also used for the voiced labiodental approximant; Pullum called this letter script V and Unicode calls it V with hook.