What ⫡ means
It is a perpendicular-style sign with an s; context supplies its meaning.
A 2000 Unicode math proposal groups it with tack signs (short T-shaped marks) and turnstiles (proof-style symbols with a crossbar), but gives no formula-wide reading. Use the definition in the equation or notation system where it appears.
Questions people ask
1Why does ⫡ 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 ⫡
Windows (Word)
Alt+XType 2AE1, then Alt+X to get ⫡.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “perpendicular with s”.
Linux
Ctrl+Shift+UType 2ae1, then Enter or Space.
HTML
⫡CSS
\2AE1How to type ⫡ in LaTeX
Load the `stix2` LaTeX math-font package; its 2021 manual lists `\perps` for ⫡.
Codes and encoding1 code points
HTML decimal
⫡
HTML hex
⫡
CSS content
content: "\2AE1";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%AB%A1
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.