What 𞹎 means
It marks a distinct math-letter style in Arabic and Persian notation. Its base is seen (س); the formula sets its role.
The alphabetic tradition appears in manuscripts and traditional print for many centuries. A proposal to add these forms to Unicode, the shared computer-text standard, began in 2005 and was updated in 2010 to preserve old and current math digitally.
Why might it show as a box?
The font may lack this Arabic math character.
As of 2026, MathML guidance lists only a few suitable fonts, including XITS and Amiri. It does not join to neighboring Arabic letters.
Don't confuse it with
1Questions people ask
1Why does 𞹎 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 𞹎
𞹎\1EE4ECodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
