Voiced bilabial click
A voiced bilabial click is a click consonant found in some of the languages of southern Africa.
The symbol in the International Phonetic Alphabet for a voiced bilabial click with a velar rear articulation is or, commonly abbreviated to, or. For a click with a uvular rear articulation, the equivalents are.
Sometimes the accompanying letter comes after the click letter, e.g. or ; this may be a simple orthographic choice, or it may imply a difference in the relative timing of the releases.