The close-mid central rounded vowel, or high-mid central rounded vowel, is a type of vowel sound. The symbol in the International Phonetic Alphabet that represents this sound is ⟨ɵ⟩, a lowercase barred letter o, and should not be confused with the Greek lettertheta, ⟨θ⟩, which in IPA corresponds to a consonant sound, the voiceless dental fricative. It was added to the IPA in 1993; before that, this vowel was transcribed ⟨ö⟩.
The IPA prefers terms "close" and "open" for vowels, and the name of the article follows this. However, a large number of linguists, perhaps a majority, prefer the terms "high" and "low".
The character ɵ has been used in several Latin-derived alphabets such as the one for Janalif, but in that language it denotes a different sound than it does in the IPA. The character is homographic with CyrillicӨ. The Unicode code point is U+019FƟlatin capital letter o with middle tilde (HTML Ɵ).
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