What ⟂ means
It means “is perpendicular to.” Lines meet at 90°; vectors or other objects may be orthogonal.
In a ⟂ b, the mark relates a to b. A small square marks the right angle in a diagram.
Don't confuse it with
1Questions 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 27C2, 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”.
Linux
Ctrl+Shift+UType 27c2, then Enter or Space.
HTML
⟂CSS
\27C2LaTeX
In math mode, `\perp` typesets the relation; TeX may render it as ⊥, not U+27C2.
Microsoft Word
In a Word equation, enter `\perp` or `\bot`, then Space. Word lists both as ⊥ as of 2026.
Codes and encoding1 code points
HTML decimal
⟂
HTML hex
⟂
CSS content
content: "\27C2";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%9F%82
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.