EDIT International Phonetic Alphabet

+ Vowel
+ Example in English // book [bʊk]
+ Sound example

+ Alternatives // unknown
+ Former versions // ɷ (U+0277)
+ Origin // Latin alphabet, small letter
+ Visual characterization // small letter omega rotated 180°

+ In the IPA since 1989
+ IPA number 321

+ This sound can be found in Arabic, Chinese, English, German, Mongolian, Russian, Swedish and Vietnamese.


Synonyms

English
+ Official name in the IPA // ›near-close near-back rounded vowel‹
+ Nonstandard // open ›u‹


+ Source //
Principles of the International Phonetic Association, London, 1949. /
Journal of the International Phonetic Association, 1989. /
Wikipedia. Die Liste der IPA-Zeichen & History of the International Phonetic Alphabet. /
Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet. /
Pullum, Geoffrey and William A. Ladusaw. Phonetic Symbol Guide. Second edition.

 FrauFriedrich