Central vowel
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A central vowel is a type of vowel sound used in some spoken languages. The defining characteristic of a central vowel is that the tongue is positioned halfway between a front vowel and a back vowel. The central vowels identified by the International Phonetic Alphabet are:
- close central unrounded vowel [ɨ]
- close central rounded vowel [ʉ]
- close-mid central unrounded vowel [ɘ]
- close-mid central rounded vowel [ɵ]
- mid central vowel [ə]
- open-mid central unrounded vowel [ɜ]
- open-mid central rounded vowel [ɞ]
- near-open central vowel [ɐ]
- open central unrounded vowel [a] (unofficial but most frequent usage)
Occasionally, the ad hoc symbols ᵻ, ᵿ (ɪ, ʊ) for near-close central vowels will be seen.