HTML Entity for Half Ring Below (U+0351)

Intermediate
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+0351

What You'll Learn

How to insert the combining Half Ring Below (U+0351) in HTML using hexadecimal, decimal, and CSS escape methods. This mark is U+0351 (COMBINING HALF RING BELOW) in the Combining Diacritical Marks block (U+0300–U+036F). It renders below a base letter and appears in IPA and other phonetic notation.

Place it after the base character (e.g. a͑). Use ͑, ͑, or CSS \351. There is no named HTML entity. Do not confuse U+0351 with U+031C (COMBINING LEFT HALF RING BELOW, ̜)—a different code point used in some charts.

⚡ Quick Reference — Half Ring Below

Unicode U+0351

Combining Diacritical Marks

Hex Code ͑

Hexadecimal reference

HTML Code ͑

Decimal reference

Named Entity

Use numeric codes only

Reference Table
Name           Value
────────────   ──────────
Unicode        U+0351
Hex code       ͑
HTML code      ͑
Named entity   (none)
CSS code       \351
Meaning        Combining half ring below
Position       Below base letter
Related        U+031C = left half ring below (̜)
1

Complete HTML Example

This example shows the Half Ring Below (U+0351) with a base letter using hexadecimal code, decimal HTML code, and a CSS content escape. Always place the combining mark after the base character:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\351";
  }
 </style>
</head>
<body>
<p>Half Ring Below using Hexadecimal: a&#x0351; o&#x0351;</p>
<p>Half Ring Below using Decimal: a&#849; o&#849;</p>
<p id="point">Half Ring Below using CSS Entity: a</p>
</body>
</html>
Try it Yourself

🌐 Browser Support

The Half Ring Below (U+0351) renders when fonts support Combining Diacritical Marks below-base positioning:

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

👀 Live Preview

Half Ring Below (U+0351) on base letters, compared with left half ring below (U+031C):

a + U+0351 (hex)
o + U+0351 (decimal)
U+031C (left half ring) a̜ (not U+0351)
Mark alone ͑
Numeric refs &#x0351; &#849; \351

🧠 How It Works

1

Hexadecimal Code

&#x0351; uses Unicode hexadecimal 0351. Place it after the base letter (e.g. a&#x0351;) so the half ring stacks below.

HTML markup
2

Decimal HTML Code

&#849; uses decimal Unicode value 849 for the same combining character.

HTML markup
3

CSS Entity

\351 is used in CSS, typically in the content property of ::after when the base letter is already in the element.

CSS stylesheet
=

Combining below the base

Order in HTML: base letter, then combining mark. Next: Hammer Pick (⛏).

Use Cases

The Half Ring Below (U+0351) is commonly used in:

📚 IPA & phonetics

International Phonetic Alphabet and linguistic transcription.

📖 Transliteration

Systems that mark specific sounds with a half ring below letters.

🎓 Language learning

Apps and materials showing pronunciation with diacritics.

📄 Academic papers

Linguistic research, dictionaries, and scholarly content.

🎨 Typography

Scripts and fonts that use below-base diacritical marks.

🌐 Multilingual sites

Content requiring correct combining-mark stacking in HTML.

💡 Best Practices

Do

  • Place U+0351 after the base character in markup
  • Use IPA-friendly fonts (Charis SIL, DejaVu Sans, etc.)
  • Declare UTF-8 with <meta charset="utf-8">
  • Verify your notation standard requires U+0351, not U+031C
  • Test below-base positioning across browsers

Don’t

  • Put the combining mark before the base letter
  • Use U+031C (̜) when you need U+0351 (half ring below)
  • Expect a named HTML entity for U+0351
  • Use CSS \351 in HTML text nodes
  • Assume every font positions below-base marks identically

Key Takeaways

1

Two HTML numeric references plus CSS insert U+0351

&#x0351; &#849;
2

For CSS, use \351 in content after the base letter

3

Unicode U+0351 — COMBINING HALF RING BELOW

4

Not the same as U+031C (left half ring below, &#796;)

❓ Frequently Asked Questions

Use &#x0351; (hex), &#849; (decimal), or \351 in CSS content. There is no named entity. Place the code after a base character (e.g. a&#x0351;) so the mark appears below it.
U+0351 (COMBINING HALF RING BELOW). Combining Diacritical Marks block. Hex 0351, decimal 849. Placed below a base letter.
In IPA and phonetic notation, transliteration, language learning, academic linguistics, typography for specific scripts, and any content that needs this diacritic below a letter.
HTML references (&#849; or &#x0351;) go in markup after the base letter. The CSS escape \351 is used in stylesheets, typically on ::after when the base letter is in the element.
U+0351 is COMBINING HALF RING BELOW (&#849; / &#x0351;). U+031C is COMBINING LEFT HALF RING BELOW (&#796; / &#x031C;). They are related IPA marks but distinct Unicode code points.

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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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