EDIT Linguistics In the International Phonetic Alphabet (IPA) it represents the sound of the Retroflex Click in some southafrican languages like that of the !Xoon in Namibia or the !Ko in Botswana. It is one of five different clicks and is created by quickly detaching the tongue from the roof of the mouth.
Source: Martin Haspelmath (et al.): The World Atlas of Language Structures, Oxford University Press, Oxford, 2005
EDIT International Phonetic Alphabet
+ Sound example
+ Alternatives // unknown
+ Former versions // ʗ (U+0297)
+ In the IPA since 1989
+ IPA number 178
+ This sound can be found in !Xóõ and Zulu.
+ Official name in the IPA // ›(post)alveolar or retroflex cick‹
+ Nonstandard // similar to a popping cork
+ Exclamation Point
+ Source //
Principles of the International Phonetic Association, London, 1949. /
Journal of the International Phonetic Association, 1989. /
Wikipedia. Die Liste der IPA-Zeichen & History of the International Phonetic Alphabet. /
Handbook of the International Phonetic Association: A Guide to the Use of the International Phonetic Alphabet. /
Pullum, Geoffrey and William A. Ladusaw. Phonetic Symbol Guide. Second edition.
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