Square With Contoured Outline
Part of Math Symbols
Square With Contoured Outline has no standard Windows Alt code. Copy the character directly, or use its HTML entity or Unicode value instead.
- Alt code
- None
- HTML entity
- ⧠
- Unicode
- U+29E0
About this symbol
⧠ is the d’Alembertian, the operator of the wave equation, named after Jean le Rond d’Alembert, who wrote down the equation for a vibrating string in 1747. It is often drawn as a plain square □.
Unicode facts
- Official name
- SQUARE WITH CONTOURED OUTLINE
- Also called
- D’Alembertian
- Type
- Maths symbol
- Unicode block
- Miscellaneous Mathematical Symbols-B
- Unicode group
- Miscellaneous mathematical symbols
- Added in
- Unicode 3.2 (2002)
Click the symbol or any value at the top of the page to copy it. See the full Math Symbols chart for related characters.