Ẑ Explained

Latin letter Z with circumflex
Letter:	Ẑẑ
Language:	Cyrillic Poliespo
Unicode:	U+1E90, U+1E91

Ẑ is a Latin script letter, the letter Z with a circumflex, used for transliteration of the Cyrillic letter Ѕ in ISO 9 family of transliteration standards, and although rarely used in Pinyin as a shorthand of zh. It's also used in Poliespo for the sound /kts/. The lower case version of the letter is ẑ.

In mathematics, ẑ often refers to the unit vector in the +Z direction.

References

^[1]

Notes and References

1. Web site: ISO 9:1995: Information and documentation -- Transliteration of Cyrillic characters into Latin characters -- Slavic and non-Slavic languages . International Organization for Standardization . 13 Apr 2012 .