HTML Entity for Tilde Inverse (∽)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+223D

HTML Entity for tilde inverse (U+223D) tutorial illustration

Definition

What Is Tilde Inverse?

Tilde inverse (∽) is the Unicode character at U+223D in Mathematical Operators. Official name: REVERSED TILDE. It is used in mathematical logic and related notation as a reversed form of the tilde operator.

Remember

Character     ∽
Unicode       U+223D
Named         &bsim;
Hex entity    &#x223D;
Decimal       &#8765;
CSS escape    \223D
Not the same  &sim; · ~ · &bsime;

Prefer &bsim; in hand-written HTML. You can also type ∽ in UTF-8, or use numeric / CSS forms.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	`&bsim;`	HTML markup (preferred)
Hex entity	`∽`	HTML markup
Decimal entity	`∽`	HTML markup
CSS escape	`\223D`	Stylesheet `content`
Direct character	`∽`	HTML text (UTF-8)
Tilde operator (related)	`&sim;` (∼, U+223C)	Ordinary math tilde

When to Use Which

Situation	Use
Reversed tilde / tilde inverse	`&bsim;` or `∽`
Ordinary tilde operator	∼ / `&sim;`
ASCII tilde (paths, code)	~ / `~`
Reverse tilde equals	⋍ / `&bsime;`
Generated text via `::before` / `::after`	`content: "\223D"`
Prefer readability in source	Named form over numeric

See it

Live Preview

Tilde inverse rendered next to related marks.

Example a ∽ b

Large glyph ∽

Compared ∽ ∼ ~ ⋍

With entities Named: ∽ | Hex: ∽ | Decimal: ∽

Code

Complete HTML Example

One page that shows Tilde Inverse with named, hex, decimal, and CSS forms. Use View Output or open the live editor.

Named + Hex + Decimal + CSS

Four ways to produce ∽, plus a short relation example.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Tilde Inverse (∽) in HTML</title>
  <style>
    #point::after {
      content: "\223D";
    }
  </style>
</head>
<body>
  <p>Using Named Entity: &bsim;</p>
  <p>Using Hex Code: &#x223D;</p>
  <p>Using HTML Code: &#8765;</p>
  <p id="point">Using CSS Entity: </p>
  <p>Example: a ∽ b</p>
</body>
</html>

Try It Yourself

How It Works

1. Named: &bsim; is the clearest form in hand-written HTML. The browser turns it into ∽.

2. Hex / decimal: U+223D → ∽ or ∽. Same glyph as the named form.

3. CSS: use \223D in content (not an HTML entity). #point::after appends that ∽ after the paragraph text.

4. Example: write a ∽ b for a short reversed-tilde relation.

Pitfalls & Tips

Common mistakes when working with Tilde Inverse.

∼

Not ordinary tilde

&sim; is U+223C (∼). Use &bsim; when you specifically need the reversed form.

Not ASCII tilde

Keyboard ~ is U+007E. Keep it for paths and code; use U+223D for the math reversed tilde.

⋍

Not reverse tilde equals

&bsime; (U+22CD) adds an equals-style relation. It is a different character from plain reversed tilde.

Named

Prefer named form

&bsim; is clearer in source than numeric forms. Always finish with a semicolon.

CSS vs HTML

Do not mix escapes

\223D belongs in CSS strings. &bsim; / ∽ / ∽ belong in HTML.

Semicolon

End entity references

Always finish with ; — write &bsim; or ∽, not bare forms without the semicolon.

Compatibility

Browser Support

Tilde inverse (U+223D) and its entity forms (&bsim;, ∽, ∽, CSS \\223D) are supported in all mainstream browsers.

✓ Universal support

Tilde Inverse (∽)

Encode with named, hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer All versions

Yes

U+223D / entities Full support

Bottom line: Prefer &bsim; in HTML. Use \\223D only inside CSS content.

Remember

Key Takeaways

Unicode: this mark is U+223D (decimal 8765) — glyph ∽.
HTML: prefer &bsim;; numeric ∽ / ∽ also work.
CSS: use \223D inside content for generated text.
Meaning: ∽ = reversed tilde — not &sim;, not ASCII ~.

One line: U+223D → &bsim; / ∽ / ∽ / CSS \223D.

Frequently Asked Questions

How do I display ∽ in HTML?

Use &bsim; (named), ∽ (hex), ∽ (decimal), type ∽ directly in UTF-8, or the CSS escape \223D in content.

What is the Unicode value for this mark?

U+223D (REVERSED TILDE). Hex 223D, decimal 8765. It belongs to Mathematical Operators (U+2200–U+22FF).

Is there a named HTML entity for U+223D?

Yes. HTML5 defines &bsim; for reversed tilde. Prefer it for readable source markup.

When should I use U+223D?

Use it in mathematical logic and equivalence-style notation for a reversed tilde. Prefer &sim; for the ordinary tilde operator, and ~ for ASCII paths or code.

What is the difference between HTML code and CSS entity for U+223D?

HTML entities (&bsim;, ∽, or ∽) go in markup. The CSS escape \223D goes in stylesheet strings (usually content on ::before/::after).

Is ∽ the same as ∼, ~, or ⋍?

No. ∽ is reversed tilde (U+223D). ∼ is tilde operator (&sim;). ~ is ASCII tilde (U+007E). ⋍ is reverse tilde equals (&bsime;).

Did you know?

Tilde inverse (∽) is Unicode U+223D (decimal 8765) — REVERSED TILDE in Mathematical Operators. HTML5 provides &bsim;. Do not confuse it with the tilde operator (&sim;, ∼), ASCII tilde (~, U+007E), or reverse tilde equals (&bsime;, ⋍).

Next: Tilde Operator Above Right Arrow

Learn the HTML entity for tilde operator above right arrow (⥲).

Continue tutorial →

About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

8 people found this page helpful

HTML Entity | Tilde Bold HTML Entity | Tilde Operator Above Right Arrow