HTML Entity for Diaeresis Below (̤)

Beginner
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+0324

What You'll Learn

How to display the combining diaeresis below in HTML using hexadecimal, decimal, and CSS entity methods. This mark is U+0324 (COMBINING DIAERESIS BELOW) in the Combining Diacritical Marks block (U+0300–U+036F). It places two dots beneath a base letter and is used in linguistic notation, transliteration systems, and specialized phonetic or academic content.

There is no named HTML entity for U+0324. Use ̤, ̤, or \0324 in CSS content, placed immediately after the base character (e.g. e̤). For the common diaeresis above (ü, ë), see Combining Diaeresis (U+0308).

⚡ Quick Reference — Diaeresis Below

Unicode U+0324

Combining Diacritical Marks (U+0300–U+036F)

Hex Code ̤

Hexadecimal reference

HTML Code ̤

Decimal reference

Named Entity

None (use numeric refs)

Reference Table
Name           Value
────────────   ──────────
Unicode        U+0324
Hex code       ̤
HTML code      ̤
Named entity   —
CSS code       \0324
1

Complete HTML Example

This example demonstrates the combining diaeresis below using hexadecimal code, decimal HTML code, and a CSS content escape, plus attaching the mark to a base letter:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\0324";
  }
 </style>
</head>
<body>
<p>Diaeresis Below using Hexadecimal: &#x0324;</p>
<p>Diaeresis Below using HTML Code: &#804;</p>
<p id="point">Diaeresis Below using CSS Entity: </p>
</body>
</html>
Try it Yourself

🌐 Browser Support

U+0324 and combining sequences are supported in modern browsers with UTF-8 and fonts that render Combining Diacritical Marks below the baseline:

Chrome 1+
Firefox 1+
Safari 1+
Edge 12+
Opera 4+
Android 4.4+
iOS Safari 3.2+

👀 Live Preview

See the combining diaeresis below on base letters:

On letters e̤   a̤   o̤
Above vs below ë (U+0308)   e̤ (U+0324)
Isolated mark ̤
Monospace refs &#x0324; &#804; \0324

🧠 How It Works

1

Hexadecimal Code

&#x0324; uses the Unicode hexadecimal value 0324 for the combining diaeresis below. Place it immediately after the base letter.

HTML markup
2

Decimal HTML Code

&#804; uses the decimal Unicode value 804 to display the same combining mark.

HTML markup
3

CSS Entity

\0324 is used in CSS stylesheets, particularly in the content property of ::before or ::after.

CSS stylesheet
=

Combines below the base letter

The mark stacks beneath the preceding character: . Unicode U+0324. No named entity. Distinct from U+0308 (diaeresis above).

Use Cases

The combining diaeresis below (U+0324) is commonly used in:

🔤 Linguistic notation

Phonetics, morphology, and other notation with diacritics below letters.

📜 Transliteration

Schemes that use a diaeresis below for specific sounds or letters from other scripts.

📚 IPA & phonetics

Phonetic transcription where combining marks below the baseline are required.

🌍 Script support

Some Semitic or other transliterations use diacritics below the letter.

📖 Unicode references

Documentation for Combining Diacritical Marks and HTML entity guides.

✍️ Font testing

Verifying font support for combining characters below the baseline.

💡 Best Practices

Do

  • Place &#x0324; or &#804; immediately after the base letter
  • Use UTF-8 and IPA-friendly fonts (Charis SIL, Doulos SIL, Noto Sans)
  • Use U+0308 for standard umlaut/diaeresis above
  • Use \0324 only inside CSS content
  • Test rendering across browsers and fonts

Don’t

  • Confuse U+0324 (below) with U+0308 (above) or U+0323 (dot below)
  • Assume a named entity exists for U+0324
  • Put the combining mark before the base letter
  • Put CSS escape \0324 in HTML text nodes
  • Mix hex and decimal styles randomly in one file

Key Takeaways

1

Combining mark U+0324—no named entity

&#x0324; &#804;
2

For CSS, use \0324 in the content property

\0324
3

COMBINING DIAERESIS BELOW—two dots under the letter

4

Less common than U+0308; used in linguistics and transliteration

5

UTF-8 + correct letter order—widely supported with suitable fonts

❓ Frequently Asked Questions

Use &#x0324; (hex), &#804; (decimal), or \0324 in CSS content immediately after the base letter. There is no named HTML entity for U+0324.
U+0324 (COMBINING DIAERESIS BELOW). Combining Diacritical Marks block (U+0300–U+036F). Hex 0324, decimal 804. Places two dots below a base letter.
For linguistic notation, transliteration, IPA or phonetic content that requires a diaeresis below a letter, and documentation for combining marks. Less common than diaeresis above (U+0308) in everyday European text.
U+0308 places two dots above a letter (ë, ü) and is common in German, French, and Spanish. U+0324 places two dots below. Both are combining characters; use U+0324 only when your notation requires the mark below.
HTML5 named entities do not include combining diacritical marks. Use &#804; or &#x0324; in HTML, or \0324 in CSS. This is standard for characters in the Combining Diacritical Marks block.

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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
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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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