HTML Entity for Lowercase O Latin (ͦ)

Beginner
⏱️ 5 min read
📚 Updated: Jun 2026
🎯 1 Code Example
Unicode U+0366
HTML Entity for Lowercase O Latin tutorial illustration

What You'll Learn

How to display the combining Latin small letter o (ͦ) in HTML using hexadecimal, decimal, and CSS escape methods. This character (U+0366) is a nonspacing combining mark from the Combining Diacritical Marks block. It appears as a small superscript “o” above a base character—for example, nͦ shows a small o above the letter n.

Render it with ͦ, ͦ, or CSS escape \366. There is no named HTML entity. As a combining character, it must follow a base character for correct rendering.

⚡ Quick Reference — Lowercase O Latin Entity

Unicode U+0366

Combining Diacritical Marks

Hex Code ͦ

Hexadecimal reference

HTML Code ͦ

Decimal reference

Named Entity —

No named entity

Reference Table
Name           Value
────────────   ──────────
Unicode        U+0366
Hex code       ͦ
HTML code      ͦ
Named entity   (none)
CSS code       \366
Meaning        Combining Latin small letter o
Type           Combining mark (nonspacing, Mn)
Block          Combining Diacritical Marks (U+0300–U+036F)
1

Complete HTML Example

A simple example showing the combining Latin small letter o (ͦ) using hexadecimal code, decimal HTML code, and a CSS content escape. The combining example shows it after a base letter:

html
<!DOCTYPE html>
<html>
<head>
 <style>
  #point:after{
   content: "\366";
  }
 </style>
</head>
<body>
<p>Symbol (hex): &#x366;</p>
<p>Symbol (decimal): &#870;</p>
<p id="point">Symbol (CSS): </p>
<p>Combining: n&#x366;</p>
</body>
</html>
Try It Yourself

🌐 Browser Support

The combining Latin small letter o (ͦ) renders correctly in modern browsers when UTF-8 is used:

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

👀 Live Preview

See the combining Latin small letter o (ͦ) and how it combines with a base character:

Glyph aloneͦ
With base letternͦ
Character typeCombining mark (not standalone o)
Not the same aso (U+006F, plain letter)  |  ͥ (combining i)
Numeric refs&#x366; &#870; \366

🧠 How It Works

1

Hexadecimal Code

&#x366; uses the Unicode hexadecimal value 366 to display the character. Place it immediately after a base character so it renders above it.

HTML markup
2

Decimal HTML Code

&#870; uses the decimal Unicode value 870 to display the same character. A common method for combining characters.

HTML markup
3

CSS Entity

\366 is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.

CSS stylesheet
=

Combining mark behavior

All three methods produce ͦ. Unicode U+0366 is a nonspacing combining character (Mn) in the Combining Diacritical Marks block. Place it immediately after a base letter (e.g. n&#x366;) so it combines correctly. There is no named HTML entity.

✅

Use Cases

The combining Latin small letter o (ͦ) is commonly used in:

📜 Medieval notation

Superscript or abbreviated letter “o” in medieval Latin script and palaeographic transcriptions.

🗣 Phonetic transcription

Phonetic or phonological notation where a small o is placed above a base letter.

🔤 Linguistics

Academic papers, critical editions, and language documentation using combining characters.

🎨 Typography

Font specimens showcasing Combining Diacritical Marks (U+0300–U+036F) support.

📄 Normalization

Unicode normalization (NFC/NFD) and text processing of combining sequences.

⚙ Unicode testing

Testing support of combining characters and correct rendering order.

📝 Annotation

Transliteration or annotation systems using ͦ to modify a base character.

💡 Best Practices

Do

  • Use &#870; or &#x366; in HTML (no named entity exists)
  • Place ͦ immediately after the base character for correct combining
  • Serve pages as UTF-8 for combining character support
  • Use fonts that support Combining Diacritical Marks (U+0300–U+036F)
  • Distinguish ͦ (combining mark) from plain o (U+006F)

Don’t

  • Assume a named entity exists—there is none for ͦ
  • Use plain o when a combining mark is required
  • Put CSS escape \366 in HTML text nodes
  • Assume all fonts render combining marks identically
  • Separate the combining mark from its base character with spaces or tags

Key Takeaways

1

Three references render ͦ (no named entity)

&#x366; &#870;
2

For CSS stylesheets, use the escape in the content property

\366
3

Unicode U+0366 — COMBINING LATIN SMALL LETTER O

4

Combining mark: place after base character (e.g. n&#x366;)

5

Previous: Lowercase O Inverted Breve (ȏ)   Next: Lowercase O Latin Subscript

❓ Frequently Asked Questions

Use &#x366; (hex), &#870; (decimal), or \366 in CSS content. There is no named HTML entity. Place it after a base character (e.g. n&#x366;) for correct positioning.
U+0366 (COMBINING LATIN SMALL LETTER O). Combining Diacritical Marks block. Hex 366, decimal 870.
Yes. It is a nonspacing combining character and should follow a base character (e.g. nͦ) for correct display.
U+0366 is a nonspacing combining mark. It attaches to the preceding base character—e.g. “n” + ͦ gives nͦ. Used alone it may display with a placeholder or not position as intended.
No. Use &#870; or &#x366; in HTML, or \366 in CSS.

Explore More HTML Entities!

Discover 1500+ HTML character references — accented letters, symbols, and more.

All HTML Entities →

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)

8 people found this page helpful

Lowercase O Inverted Breve (ȏ) Lowercase O Latin Subscript