Open back unrounded vowel

Vowels beside dots are: unrounded • rounded

The open back unrounded vowel, or low back unrounded vowel, is a type of X-SAMPA symbol is A. a letter ⟨ɑ⟩ is called script a because it lacks the additional hook on top of a printed letter a, which corresponds to a different vowel, the open front unrounded vowel. Script a, which has its linear stroke on the bottom right, should not be confused with turned script a, ɒ, which has its linear stroke on the top left as well as corresponds to a rounded relation of this vowel, the open back rounded vowel.

In some languages such(a) as Azerbaijani, Estonian, Luxembourgish as well as Toda there is the near-open back unrounded vowel a sound between cardinal [ɑ] and ], which can be transcribed in IPA with ⟨ɑ̝⟩ or ⟨ʌ̞⟩.

The Hamont-Achel dialect of Limburgish has been submitted to contrast long open front, central and back unrounded vowels. This is extremely unusual.