Uppercase O with diaeresis and macron (Ȫ) is the Unicode character at U+022A in Latin Extended-B. Official name: LATIN CAPITAL LETTER O WITH DIAERESIS AND MACRON — a capital O with both a diaeresis (¨) and a macron (¯), used in linguistics and transliteration.
Remember
Character Ȫ
Unicode U+022A
Named entity (none)
Hex entity Ȫ
Decimal Ȫ
CSS escape \022A
Not the same ȫ · Ö · Ō
Prefer Ȫ or Ȫ in HTML markup. You can also type Ȫ in UTF-8. The lowercase pair is ȫ (U+022B). HTML5 has no named entity for either form.
Using Hex Code: Ȫ
Using HTML Code: Ȫ
Using CSS Entity: Ȫ
Typed directly: Ȫ
Case pair: Ȫ / ȫ
How It Works
1. Hex:U+022A → Ȫ in HTML. Preferred numeric form when you need an entity.
2. Decimal: same code point as 554 → Ȫ. Same glyph as hex.
3. CSS: use \022A (four hex digits) in content. Shorter forms can be misread by the CSS parser. #point::after appends that Ȫ.
4. Typed / pair: paste Ȫ in UTF-8, or show both cases with Ȫ / ȫ.
5. No named entity: HTML5 does not define a name for U+022A — use numeric references or type the character. Ö is diaeresis-only Ö; Ō is macron-only Ō — neither is Ȫ.
Pitfalls & Tips
Common mistakes when working with U+022A.
Named
No named HTML entity
There is no named entity for U+022A. Use Ȫ or Ȫ.
vs Ö
Not diaeresis only
Ö (Ö) has a diaeresis only. Ȫ has both a diaeresis and a macron.
vs Ō
Not macron only
Ō (Ō) has a macron only. Ȫ adds the diaeresis as well — do not swap them.
Encoding
Keep UTF-8 declared
Latin Extended-B letters display reliably with <meta charset="UTF-8">. Prefer numeric entities when the source file encoding is uncertain.
CSS vs HTML
Do not mix escapes
\022A belongs in CSS strings. Ȫ / Ȫ belong in HTML.
Fonts
Coverage varies
Some UI fonts omit less-common Latin Extended-B glyphs. Test Ȫ in your target fonts.
Compatibility
Browser Support
Uppercase O with diaeresis and macron (U+022A) and its entity forms (Ȫ, Ȫ, CSS \\022A) are supported in all mainstream browsers. Visible glyphs depend on Latin Extended-B font coverage.
✓ Universal support
Uppercase O Diaeresis Macron (Ȫ)
Encode with hex, decimal, CSS escape, or type the character — same code point everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerIE 9+
Yes
U+022AFull support
Bottom line: Prefer Ȫ or Ȫ in HTML (no named entity). Use \\022A only inside CSS content. Do not confuse with diaeresis Ö or macron Ō.
Remember
Key Takeaways
Unicode: uppercase O with both marks is U+022A (decimal 554) — glyph Ȫ.
HTML: no named entity — use Ȫ / Ȫ or type the character.
CSS: use \022A (four hex digits) inside content.
Meaning:Ȫ is both marks — not ȫ (lower), not Ö (diaeresis), not Ō (macron).
One line:U+022A → Ȫ / Ȫ / CSS \022A (no named entity).
Frequently Asked Questions
Use Ȫ (hex), Ȫ (decimal), type Ȫ directly in UTF-8, or the CSS escape \022A in content. There is no named HTML entity.
U+022A (LATIN CAPITAL LETTER O WITH DIAERESIS AND MACRON). Hex 022A, decimal 554. It belongs to Latin Extended-B (U+0180–U+024F).
No. Use numeric references Ȫ or Ȫ, or type Ȫ in UTF-8.
No. Ȫ is U+022A (capital with both marks). ȫ is U+022B (lowercase). Ö is U+00D6 (Ö, diaeresis only). Ō is U+014C (Ō, macron only).
Use it for linguistic or transliteration text that needs capital O with both a diaeresis and a macron — not as a substitute for Ö or Ō alone.
HTML entities (Ȫ or Ȫ) go in markup. The CSS escape \022A goes in stylesheet strings (usually content on ::before/::after). Prefer four hex digits in CSS.
🤔
Did you know?
Uppercase O with diaeresis and macron is Unicode U+022A (decimal 554) — glyph Ȫ in Latin Extended-B (U+0180–U+024F). Official name: LATIN CAPITAL LETTER O WITH DIAERESIS AND MACRON. HTML5 has no named entity — use Ȫ or Ȫ. Lowercase pair is U+022B (ȫ). Used in linguistics and transliteration. Do not confuse with diaeresis-only Ö (Ö, U+00D6) or macron-only Ō (Ō, U+014C).
