What ⨺ means
⨹ has plus; ⨻ has multiplication. Unicode's math-character table lists ⨺ beside ⨹, the plus sign in a triangle, and ⨻, the multiplication sign in a triangle. The three are related by this documented operator set; the grouping does not say which operation a particular formula assigns.
Don't confuse it with
4Worth knowing
- A 1998 MathML draft, an early web format for equations, listed the sign in a character table based on ISO 9573-13, a standard collection of mathematical character names.
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 2A3A, 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 “minus sign in triangle”.
Linux
Ctrl+Shift+UType 2a3a, then Enter or Space.
HTML
⨺CSS
\2A3AHTML
In the HTML standard as of 2026-10-08, `⨺` and `⨺` both represent ⨺.
Codes and encoding1 code points
HTML decimal
⨺
HTML hex
⨺
CSS content
content: "\2A3A";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A8%BA
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.