EDIT International Phonetic Alphabet

+ This symbol is called the half length mark and means that the sound is pronounced half long.
+ Example in English // beat [biˑt]

+ Other // This symbol belongs to the suprasegmentalia, or suprasegmental symbols, which characterize the intensity of sounds.


Synonyms

English
+ Half length mark


+ 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.

 FrauFriedrich