Nasal alveolar click
The alveolar nasal click is a click consonant found primarily among the languages of southern Africa. The symbol in the International Phonetic Alphabet for a nasal alveolar click with a velar rear articulation is  or , commonly abbreviated to ,  or ; a symbol abandoned by the IPA but still preferred by some linguists is  or , abbreviated ,  or . For a click with a uvular rear articulation, the equivalents are  and . 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. Features
Features of the alveolar nasal click:

Occurrence
Alveolar nasal clicks are found primarily in the various Khoisan language families of southern Africa and in some neighboring Bantu languages such as Yeyi. Glottalized alveolar nasal click

All Khoisan languages, and a few Bantu languages, have glottalized nasal clicks. These are formed by closing the glottis so that the click is pronounced in silence; however, any preceding vowel will be nasalized. References

Nasal consonants
Click consonants
Central consonants
Voiced consonants