⊟

Math Operator 156

Unicode
U+229F
Category
Math
HTML Entity
⊟
CSS
\229F
The ⊟ (squared minus) symbol features a standard minus sign neatly enclosed within a square. In mathematics, it frequently represents a custom binary operation, such as subtraction within a specific algebraic ring or matrix system, helping to distinguish it from standard arithmetic subtraction. Outside of advanced math, it visually resembles a "minimize" or "collapse" button found in many software user interfaces.

How to Type

Windows
Alt + 8863
macOS
Control + Command + Space, then search "squared minus"
Linux
Ctrl+Shift+U then 229F
HTML
⊟ or ⊟

In Programming

In LaTeX, the \boxminus command renders this symbol for mathematical typesetting. Programmers and mathematicians use it in abstract algebra or custom operator definitions to prevent confusion with the standard subtraction sign.

Read full meaning article

Tags

UI icon abstract algebra algebraic ring box minus boxed boxed minus collapse icon mathematics minimize button minus in square operator software UI symbol squared minus subtract in box subtraction

Related Symbols

± Plus Minus Sign × Multiplication Sign ÷ Division Sign ≠ Not Equal To ≈ Approximately Equal To ∞ Infinity √ Square Root ∑ Summation ∫ Integral π Pi ≤ Less Than or Equal To ≥ Greater Than or Equal To