HTML Entity for Long Solidus Overlay (̸)

Beginner
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+0338
HTML Entity for Long Solidus Overlay tutorial illustration

What You'll Learn

How to display the Long Solidus Overlay (̸) in HTML using various entity methods. The Long Solidus Overlay is a combining diacritical mark that overlays a long diagonal slash across another character and is essential for mathematical notation, logical symbols, and academic content.

This character is part of the Combining Diacritical Marks Unicode block and can be rendered with a hexadecimal reference, a decimal reference, or a CSS escape in the content property. There is no named HTML entity for this combining mark.

⚡ Quick Reference — Long Solidus Overlay Entity

Unicode U+0338

Combining Diacritical Marks

Hex Code ̸

Hexadecimal reference

HTML Code ̸

Decimal reference

Named Entity —

No named entity

Reference Table
Name           Value
────────────   ──────────
Unicode        U+0338
Hex code       ̸
HTML code      ̸
Named entity   (none)
CSS code       \0338
Meaning        Combining long solidus overlay
Block          Combining Diacritical Marks (U+0300–U+036F)
1

Complete HTML Example

A simple example showing the Long Solidus Overlay (̸) using hexadecimal code, decimal HTML code, and a CSS content escape:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\0338";
  }
 </style>
</head>
<body>
<p>Symbol (hex): &#x0338;</p>
<p>Symbol (decimal): &#824;</p>
<p id="point">Symbol (CSS): </p>
</body>
</html>
Try it Yourself

🌐 Browser Support

The Long Solidus Overlay (̸) is supported in modern browsers when the font includes Combining Diacritical Marks glyphs:

Chrome1+
Firefox1+
Safari1+
Edge12+
Opera4+
Android4.4+
iOS Safari1+

👀 Live Preview

See the Long Solidus Overlay (̸) combined with base characters in mathematical and logical contexts:

Combining mark̸ (overlay alone)
Not element ofx ∉ A (x not in A)
Negated relation≰ (not less-than-or-equal)
Large glyph↛
Numeric refs&#x0338; &#824; \0338

🧠 How It Works

1

Hexadecimal Code

&#x0338; uses the Unicode hexadecimal value 0338 to display the Long Solidus Overlay. The x prefix indicates hexadecimal format.

HTML markup
2

Decimal HTML Code

&#824; uses the decimal Unicode value 824 to display the same combining mark. This is one of the most commonly used methods.

HTML markup
3

CSS Entity

\0338 is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.

CSS stylesheet
=

Combining character

U+0338 is a nonspacing combining mark—place it immediately after a base character (e.g. &#x2192;&#x0338;) to create negated symbols. Unicode U+0338 sits in the Combining Diacritical Marks block. There is no named HTML entity.

✅

Use Cases

The Long Solidus Overlay (̸) is commonly used in:

📐 Mathematical notation

Create negated variants of symbols (e.g. negated arrows, not less-than-or-equal).

∨ Logical notation

Represent negation in logical expressions and set theory (e.g. not element of).

📄 Academic documents

Display mathematical or logical formulas in papers, textbooks, and research content.

🔤 Linguistic notation

Use in phonetic or linguistic transcription and notation.

📝 Technical writing

Document specifications, APIs, or technical content that include negated operators.

📖 Education

Teach mathematics, logic, or set theory with proper symbol rendering.

🔬 Scientific publishing

Ensure correct rendering of negated symbols in scientific and technical publications.

💡 Best Practices

Do

  • Place ̸ immediately after the base character it overlays
  • Use numeric references (&#x0338; or &#824;) consistently in HTML
  • Verify font support for combining diacritical marks across devices
  • Use \0338 in CSS content when inserting via pseudo-elements
  • Add aria-label or surrounding text for accessibility when symbols stand alone

Don’t

  • Put the combining mark before the base character—order matters
  • Put CSS escape \0338 in HTML text nodes
  • Expect a named HTML entity—only numeric codes work for ̸
  • Assume screen readers interpret combining marks without context
  • Mix entity styles randomly in one file

Key Takeaways

1

Three references render ̸ (no named entity)

&#x0338; &#824;
2

For CSS stylesheets, use the escape in the content property

\0338
3

Unicode U+0338 — COMBINING LONG SOLIDUS OVERLAY

4

A combining mark—follow a base character to form negated symbols

5

Previous: Long S (ſ)   Next: Long Stroke Overlay

❓ Frequently Asked Questions

Use &#x0338; (hex), &#824; (decimal), or \0338 in CSS content. All produce the combining mark. There is no named HTML entity.
U+0338 (COMBINING LONG SOLIDUS OVERLAY). Combining Diacritical Marks block. Hex 0338, decimal 824. It is a nonspacing combining character used to create negated symbols in mathematical and logical notation.
For mathematical notation with negated symbols, logical expressions and set theory, academic documents, linguistic notation, technical writing, and educational content on math or logic.
HTML code (&#824; or &#x0338;) is used in HTML content. The CSS entity (\0338) is used in CSS, e.g. in the content property of ::before or ::after. Both produce the same combining mark but in different contexts.
Named HTML entities are typically reserved for ASCII, Latin-1, and some common symbols. Combining characters like ̸ use numeric codes (hex or decimal) because they are part of specialized Unicode blocks.

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About the author

Mari Selvan M P
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)

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