Open o or turned c (majuscule: ÃÂ, minuscule: ÃÂ) is a letter of the extended Latin alphabet. In the International Phonetic Alphabet, it represents the open-mid back rounded vowel. It is used in the orthographies of many African languages using the African reference alphabet.
The Yucatec Maya language used àto transcribe the alveolar ejective affricate consonant in the orthography of the Colonial period. Now dz or tsü is preferred.
On the macOS US Extended keyboard, ÃÂ and ÃÂ can be typed with followed by or .
Open o looks like a reversed letter 'C'. Claudius introduced a ÃÂ (the antisigma) with the intention of replacing bs and ps.
The Scandinavian explanatory symbol (forklaringstegnet) can be typeset using the open o followed by a colon, thus: ÃÂ:. It is used to mean "namely", "id est", "scilicet" or similar.
This letter is often used to refer to the Copyleft official sign, which looks like an open o with a circle around it.