Squared Minus Operator ⊟

Semantic identity and intent

Characters to distinguish

• ⊞ — Squared Plus Operator

Use ⊟ in the right format

Meaning and usage

Represents a custom subtraction-like operation in algebra or logic.

Define the operation before using it in calculations or diagrams.

Pronunciation: squared minus operator

Formula examples

How to type Squared Minus Operator

Windows

Use Character Map or enter U+229F in a Unicode-aware application.

macOS

Open Character Viewer with Control–Command–Space and search by the symbol name.

Microsoft Word

In an equation, type \boxminus and press Space when Word supports the command.

iPhone and iPad

Copy and paste ⊟, or use a math/LaTeX app. The standard iOS keyboard may not expose every mathematical symbol.

Android

Copy and paste ⊟, or use a math keyboard or LaTeX editor. Keyboard layouts vary by device and app.

Google Docs

For plain text, paste ⊟ or use Insert → Special characters. For structured math, use the equation editor and verify \boxminus.

Excel

Paste ⊟ into a cell or use Insert → Symbol when available. Ordinary cells preserve the character but do not interpret LaTeX commands.

Common mistakes

• Preserve grouping, operator order, and spacing around ⊟; Define the operation before using it in calculations or diagrams.
• For plain text, copy ⊟ as U+229F; for structured equations, use \boxminus in math mode. A look-alike glyph or image can break search, accessibility, or parsing when the intended character is Squared Minus Operator.

When to use ⊟

• Use ⊟ in plain text when a Unicode character is appropriate and the destination preserves U+229F.
• Use \boxminus in an equation editor when mathematical spacing or structure matters.
• Define the local meaning when Squared Minus Operator is used in functions operators with a field-specific convention.

Look-alikes and related characters

• ⊞ — Squared Plus Operator

Font and compatibility notes

Font coverage varies; verify the code point and destination rendering before publication.

Review and source notes

Quality tier: catalog

Last reviewed: 2026-07-23

Review method: Catalog review of character identity and notation mappings.

Verified against: Unicode Standard, Unicode mathematical notation guidance, and established LaTeX/MathML syntax.

Reference sources

• The Unicode StandardUnicode Consortium — Character identity, encoding, names, and conformance.
• Unicode Character Code ChartsUnicode Consortium — Code points and official character charts.

Frequently asked questions