The open back rounded vowel, or low back rounded vowel, is a type of vowel sound, used in some spoken languages. The symbol in the International Phonetic Alphabet that represents this sound is . It is called Latin turned alpha being a rotated version of Latin alpha. It seems a "turned script a", being a rotated version of "script (cursive) a", which is the variant of a that lacks the extra stroke on top of a "printed a". Latin turned alpha a has its linear stroke on the left, whereas Latin alpha a (for its unrounded counterpart) has its linear stroke on the right.
In some languages there is the near-open back rounded vowel (a sound between cardinal and ), which can be transcribed in IPA with or .