EDIT Length mark NB: there is a bug in some versions of MS Internet Explorer that causes this character not to display. It is probably best to use a simple colon instead.

 88.73.99.19 

EDIT International Phonetic Alphabet

+ Example in English // zoo [zuː]
+ Visual characterization // two triangles above one another, points facing

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


Synonyms

English
+ 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