Back صائت خلفي متوسط مدور Arabic Vocal media posterior redondeada Spanish Voyelle moyenne postérieure arrondie French 円唇後舌中央母音 Japanese 후설 원순 중모음 Korean Midde gerónjen achterklinker LI အနောက်တစ်ဝက်အဝိုင်းသရ MY Vocala mejana posteriora arredondida OC Samogłoska półprzymknięta tylna zaokrąglona Polish Огублённый гласный заднего ряда среднего подъёма Russian
| Mid back rounded vowel | |
|---|---|
| o̞ | |
| ɔ̝ | |
| IPA number | 307 430 |
| Audio sample | |
| Encoding | |
| Entity (decimal) | o̞ |
| Unicode (hex) | U+006F U+031E |
| Braille |    |
| IPA: Vowels | ||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ||||||||||||||||||||||||||||||||
|
Legend: unrounded • rounded |
The mid back rounded vowel is a type of vowel sound, used in some spoken languages. While there is no dedicated symbol in the International Phonetic Alphabet that represents the exact mid back rounded vowel between close-mid [o] and open-mid [ɔ], it is normally written ⟨o⟩. If precision is desired, diacritics may be used, such as ⟨o̞⟩ or ⟨ɔ̝⟩, the former being more common. There was an alternative IPA symbol for this sound, ⟨ꭥ⟩. A non-IPA letter ⟨ⱺ⟩ is also found.
Just because a language has only one non-close non-open back vowel, it still may not be a true-mid vowel. Tukang Besi is a language in Sulawesi, Indonesia, with a close-mid [o]. Taba, another language in Indonesia, in the Maluku Islands, has an open-mid [ɔ]. In both languages, there is no contrast with another mid (true-mid or close-mid) vowel.
Kensiu, in Malaysia and Thailand, is highly unusual in that it contrasts true-mid vowels with close-mid and open-mid vowels without any difference in other parameters, such as backness or roundedness.