The open central rounded vowel, or low central rounded vowel, is a type of vowel sound, used in few spokenlanguages. While the International Phonetic Alphabet officially has no dedicated letter for this sound between front [ɶ] and back [ɒ], it is normally written ⟨ɒ⟩. If precision is required, it can be specified by using diacritics, such as centralized ⟨ɒ̈⟩ or centralized ⟨ɶ̈⟩.
Altendorf, Ulrike; Watt, Dominic (2004), "4. The Southeast", in Schneider, Edgar W.; Burridge, Kate; Kortmann, Bernd; Mesthrie, Rajend; Upton, Clive (eds.), A handbook of varieties of English, 1: Phonology, Mouton de Gruyter, pp. 181–196, ISBN3-11-017532-0
Breatnach, Risteard B. (1947), The Irish of Ring, Co. Waterford, Dublin Institute for Advanced Studies, ISBN0-901282-50-2