HTML Entity for Reverse Tilde Equals (⋍)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+22CD

HTML Entity for reverse tilde equals (⋍) tutorial illustration

Definition

What Is Reverse Tilde Equals?

Reverse tilde equals (⋍) is Unicode U+22CD in the Mathematical Operators block. Official name: REVERSE TILDE EQUALS — a math relation symbol used in formal notation. HTML provides the named entity &bsime;.

Remember

Character     ⋍
Unicode       U+22CD
Hex entity    &#x22CD;
Decimal       &#8909;
Named entity  &bsime;
CSS escape    \22CD
Not the same  ≃ U+2243 · ∽ U+223D · ≈ U+2248

All of these produce the same glyph: ⋍. Prefer &bsime; in hand-written HTML; type ⋍ in UTF-8 when you can; use numeric or CSS forms for generated content.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Direct character	`⋍`	HTML text (UTF-8)
Named entity	`&bsime;`	HTML markup (preferred name)
Hex entity	`⋍`	HTML markup
Decimal entity	`⋍`	HTML markup
CSS escape	`\22CD`	Stylesheet `content`

When to Use Which

Situation	Use
Reverse tilde equals in math / logic	`&bsime;` or type `⋍`
Asymptotically equal to	≃ (U+2243) / `&sime;`
Reversed tilde (∽)	∽ (U+223D) / `&bsim;`
Almost equal (informal ≈)	≈ (U+2248) / `≈`
Generated text via `::before` / `::after`	`content: "\22CD"`

See it

Live Preview

Reverse tilde equals in common study contexts.

Inline math a ⋍ b

Large glyph ⋍

In a sentence We write P ⋍ Q in this notation.

vs. related operators ⋍ reverse · ≃ asymptotic · ∽ reversed tilde

With entities Named: ⋍ | Hex: ⋍ | Decimal: ⋍

Code

Complete HTML Example

One page that shows ⋍ with hex, decimal, named entity, CSS escape, and a typed character. Use View Output or open the live editor.

Hex + Decimal + Named + CSS + Typed

Five ways to produce ⋍ in a single document.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Reverse Tilde Equals (⋍) in HTML</title>
  <style>
    #point::after {
      content: "\22CD";
    }
  </style>
</head>
<body>
  <p>Reverse tilde equals using Hex Code: &#x22CD;</p>
  <p>Reverse tilde equals using HTML Code: &#8909;</p>
  <p>Reverse tilde equals using Named Entity: &bsime;</p>
  <p id="point">Reverse tilde equals using CSS Entity: </p>
  <p>Typed directly: ⋍</p>
</body>
</html>

Try It Yourself

How It Works

1. Hex: U+22CD → ⋍ in HTML. The browser turns it into ⋍.

2. Decimal: same code point as 8909 → ⋍. Same result as hex.

3. Named: &bsime; is the standard HTML name for U+22CD — clear in source.

4. CSS: use \22CD in content (not an HTML entity). #point::after appends that ⋍ after the paragraph text.

5. Typed ⋍: fine in UTF-8 source. All five lines show the same glyph.

Pitfalls & Tips

Common mistakes when working with reverse tilde equals (⋍).

≃

Not asymptotically equal

&sime; (U+2243 ≃) is a different symbol. Use &bsime; for ⋍.

∽

Not reversed tilde

&bsim; (U+223D ∽) has no equals bar. &bsime; is reverse tilde equals.

Name

Prefer &bsime;

The named entity is easiest to read in source. Numeric forms are fine for generators.

CSS vs HTML

Do not mix escapes

\22CD belongs in CSS. ⋍ / ⋍ / &bsime; belong in HTML.

Encoding

Declare UTF-8

If you type ⋍ directly, keep <meta charset="UTF-8"> so the file is not misread.

Semicolon

End references

Always finish with ; — write &bsime;, not &bsime.

Compatibility

Browser Support

Reverse tilde equals (U+22CD) and its entity forms (&bsime;, ⋍, ⋍, CSS \\22CD) are supported in all modern browsers.

✓ Universal encoding

Reverse Tilde Equals (⋍)

Encode with named, hex, decimal, or CSS escape — or type ⋍ directly in UTF-8 HTML.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer IE 9+

Yes*

U+22CD / &bsime; Full support

Bottom line: Prefer &bsime; in HTML. Use \\22CD only inside CSS content.

Remember

Key Takeaways

Unicode: this character is U+22CD (decimal 8909).
HTML: prefer &bsime;, or use ⋍ / ⋍.
CSS: use \22CD inside content for generated text.
Watch out: ⋍ ≠ ≃ (&sime;) ≠ ∽ (&bsim;).

One line: U+22CD → &bsime; / ⋍ / ⋍ / CSS \22CD.

Frequently Asked Questions

How do I display reverse tilde equals (⋍) in HTML?

Use ⋍ (hex), ⋍ (decimal), &bsime; (named), or the CSS escape \22CD in the content property. All render ⋍. You can also paste ⋍ directly if your file is UTF-8.

What is the Unicode value for reverse tilde equals?

U+22CD (hex 22CD, decimal 8909). Unicode names it REVERSE TILDE EQUALS. It belongs to the Mathematical Operators block.

Is there a named HTML entity for ⋍ (U+22CD)?

Yes. &bsime; maps to U+22CD. Prefer it in hand-written HTML; numeric forms are useful in generated markup.

How is ⋍ different from ≃ or ∽?

⋍ (U+22CD, &bsime;) is reverse tilde equals. ≃ (U+2243, &sime;) is asymptotically equal to. ∽ (U+223D, &bsim;) is reversed tilde. They are different code points — do not substitute blindly.

What is the difference between HTML code and CSS entity for ⋍?

HTML entities (⋍, ⋍, or &bsime;) go in markup. The CSS escape \22CD is used in stylesheets (usually in the content property of ::before/::after). Both render ⋍.

When should I use reverse tilde equals?

When your math or logic notation specifically calls for reverse tilde equals (⋍). Prefer &bsime; for readable HTML source; use asymptotically equal (≃) or reversed tilde (∽) only when those are the intended symbols.

Did you know?

Reverse tilde equals is Unicode U+22CD (decimal 8909) in the Mathematical Operators block — official name REVERSE TILDE EQUALS. HTML’s named reference is &bsime;. It is not the same as asymptotically equal (U+2243 ≃, &sime;) or reversed tilde (U+223D ∽, &bsim;).

Next: Reverse Triple Prime

Learn the HTML entity for reverse triple prime — next in this sequence.

Continue tutorial →

About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
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I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

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