Not to be confused with Œ
Oe or barred O (Ө ө; italics: Ө ө) is a letter of the Cyrillic script.
Its form was copied from the Latin letter barred O (Ɵ ɵ) used in Jaᶇalif and other alphabets. Despite having a similar shape, it is related neither to the Greek letter theta (Θ θ/ϑ) nor to the archaic Cyrillic letter fita (Ѳ ѳ). However, traditional forms of Cyrillic fita (since the 18th century) and oe are identical, and designers of Unicode's sample font were probably the first ones who split glyphs of the two letters (providing Oe with a horizontal bar and Fita with a tilde-shaped bar inside). In traditional typography, the shape of the inner line depends on typeface, not on meaning of the letter: the bar in both oe and fita may either be straight or wavy.
Oe is used in the alphabets of the Bashkir, Buryat, Kalmyk, Kazakh, Kyrgyz, Tuvan, Mongolian, and Yakut languages, in which it represents the open-mid front rounded vowel /œ/. In Kazakh, this letter may also express /wʉ/. The International Phonetic Alphabet uses the identically shaped Latin counterpart, ɵ, to represent the close-mid central rounded vowel, and sometimes also the mid central rounded vowel.
Oe is most commonly romanized as ⟨Ö⟩; but its ISO 9 transliteration is ⟨ô⟩.
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