HTML Entity for Tilde Inverse (∽)
What You'll Learn
How to display the Tilde Inverse symbol (∽) in HTML using hexadecimal, decimal, named entity, and CSS escape methods. This character is U+223D (REVERSED TILDE) in the Mathematical Operators block (U+2200–U+22FF)—used for inverse similarity and equivalence in mathematical logic and set theory.
Render it with ∽, ∽, the named entity ∽, or CSS escape \223D. Do not confuse ∽ with ∼ (Tilde Operator, U+223C, ∼) or ~ (ASCII Tilde, U+007E).
⚡ Quick Reference — Tilde Inverse Entity
U+223DMathematical Operators
∽Hexadecimal reference
∽Decimal reference
∽Most readable option
Name Value
──────────── ──────────
Unicode U+223D
Hex code ∽
HTML code ∽
Named entity ∽
CSS code \223D
Block Mathematical Operators (U+2200–U+22FF)
Official name REVERSED TILDE
Related U+223C; = Tilde Operator (∼), U+007E = Tilde (~)Complete HTML Example
This example demonstrates the Tilde Inverse symbol (∽) using hexadecimal code, decimal HTML code, named entity, and a CSS content escape:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\223D";
}
</style>
</head>
<body>
<p>Using Hexadecimal: ∽</p>
<p>Using HTML Code: ∽</p>
<p>Using Named Entity: ∽</p>
<p id="point">Using CSS Entity: </p>
</body>
</html>🌐 Browser Support
The Tilde Inverse entity renders in modern browsers when fonts include Mathematical Operators glyphs:
👀 Live Preview
See the Tilde Inverse symbol (∽) in mathematical context:
🧠 How It Works
Hexadecimal Code
∽ uses the Unicode hexadecimal value 223D to display the Tilde Inverse symbol.
Decimal HTML Code
∽ uses the decimal Unicode value 8765 to display the same character.
CSS Entity
\223D is used in CSS stylesheets in the content property of pseudo-elements like ::before and ::after.
Named Entity
∽ is the semantic named entity — short for “backslash similar” and the easiest to read in source HTML.
Same visual result
All four methods produce the glyph: ∽. Unicode U+223D (REVERSED TILDE) in the Mathematical Operators block.
Use Cases
The Tilde Inverse symbol (∽) commonly appears in:
Formal logic and inverse similarity relations.
Equivalence classes and theoretical mathematics.
Proofs showing inverse equivalence or similarity.
Research papers and academic publications.
Theorem statements and formal demonstrations.
Logic and set theory textbooks.
Algorithm descriptions and formal specifications.
💡 Best Practices
Do
- Prefer
∽for readable source markup - Use ∽ for reversed/inverse tilde in math notation
- Pick one style (hex / decimal / named) per project
- Add
aria-labelfor standalone symbols in UI - Test the glyph across browsers and math-friendly fonts
Don’t
- Confuse ∽ (bsim) with ∼ (sim) or ~ (U+007E)
- Mix entity styles randomly in one file
- Put CSS escape
\223Ddirectly in HTML text nodes - Use HTML entities in JS (use
\u223Dinstead) - Assume all fonts render ∽ clearly at small sizes
Key Takeaways
Three HTML references all render ∽
∽ ∽ ∽For CSS stylesheets, use the escape in the content property
\223DUnicode U+223D — REVERSED TILDE
Prefer ∽ — the named entity for reversed tilde
Pair with Tilde Operator (∼) when documenting tilde symbols
❓ Frequently Asked Questions
∽ (hex), ∽ (decimal), ∽ (named), or \223D in CSS content. All produce ∽.U+223D (REVERSED TILDE). Mathematical Operators block (U+2200–U+22FF). Hex 223D, decimal 8765.∽ is more readable in source code. Numeric references (∽ or ∽) are more explicit. CSS escape \223D is for stylesheets only. All produce ∽.∽ is the named HTML entity for ∽. The name bsim stands for backslash similar / reversed similar and is part of the HTML5 standard.Explore More HTML Entities!
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