Uppercase A with diaeresis and macron (Ǟ) is the Unicode character at U+01DE in Latin Extended-B. Official name: LATIN CAPITAL LETTER A WITH DIAERESIS AND MACRON — a capital A that carries both an umlaut (diaeresis) and a macron (bar), used in linguistic and phonetic texts.
Remember
Character Ǟ
Unicode U+01DE
Named entity (none)
Hex entity Ǟ
Decimal Ǟ
CSS escape \01DE
Not the same Ä · Ā · ǟ
Prefer Ǟ or Ǟ in HTML markup. You can also type Ǟ in UTF-8. For diaeresis only, use Ä (Ä); for macron only, use Ā (Ā).
Using Hex Code: Ǟ
Using HTML Code: Ǟ
Using CSS Entity: Ǟ
Typed directly: Ǟ
Case pair: Ǟ / ǟ
How It Works
1. Hex:U+01DE → Ǟ in HTML. Preferred numeric form when you need an entity.
2. Decimal: same code point as 478 → Ǟ. Same glyph as hex.
3. CSS: use \01DE in content (not an HTML entity). #point::after appends that Ǟ after the paragraph text.
4. Typed / pair: paste Ǟ in UTF-8, or show the case pair with Ǟ / ǟ.
5. No named entity: HTML5 does not define a name for U+01DE — use numeric references or type the character.
Pitfalls & Tips
Common mistakes when working with U+01DE.
vs Ä
Not umlaut-only Ä
Ä (Ä) has a diaeresis only. Ǟ adds a macron as well — do not use Ä as a substitute.
vs Ā
Not macron-only Ā
Ā (Ā) has a macron only. Use it for long-A notation, not for the compound diaeresis+macron form.
Named
No named HTML entity
There is no Ämacron; (or similar) for U+01DE. Use Ǟ or Ǟ.
Fonts
Needs Latin Extended-B coverage
Some UI fonts omit rarer Latin Extended-B letters. Prefer a stack with good Latin coverage if the glyph must always show.
CSS vs HTML
Do not mix escapes
\01DE belongs in CSS strings. Ǟ / Ǟ belong in HTML.
A11y
Use real language text
When this letter appears in real words, keep surrounding text and lang accurate so screen readers get useful context.
Compatibility
Browser Support
Uppercase A with diaeresis and macron (U+01DE) and its entity forms (Ǟ, Ǟ, CSS \\01DE) are supported in all mainstream browsers. Visible glyphs depend on Latin Extended-B font coverage.
✓ Universal support
Uppercase A Diaeresis Macron (Ǟ)
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 ExplorerAll versions
Yes
U+01DE / entitiesFull support
Bottom line: Prefer Ǟ or Ǟ in HTML. Use \\01DE only inside CSS content. There is no named entity.
Remember
Key Takeaways
Unicode: A with diaeresis and macron is U+01DE (decimal 478) — glyph Ǟ.
HTML: no named entity — use Ǟ / Ǟ / type Ǟ.
CSS: use \01DE inside content for generated text.
Meaning:Ǟ is diaeresis+macron — not Ä (Ä), not Ā (Ā).
One line:U+01DE → Ǟ / Ǟ / CSS \01DE (no named entity).
Frequently Asked Questions
Use Ǟ (hex), Ǟ (decimal), type Ǟ directly in UTF-8, or the CSS escape \01DE in content. There is no named HTML entity.
U+01DE (LATIN CAPITAL LETTER A WITH DIAERESIS AND MACRON). Hex 01DE, decimal 478. It belongs to Latin Extended-B (U+0180–U+024F).
No. Use numeric references Ǟ or Ǟ, or type Ǟ in UTF-8.
No. Ǟ has both a diaeresis (umlaut) and a macron. Ä is U+00C4 (Ä, diaeresis only). Ā is U+0100 (Ā, macron only).
Use it for linguistic or orthographic text that specifically needs A with diaeresis and macron together — not as a substitute for Ä or Ā alone.
HTML entities (Ǟ or Ǟ) go in markup. The CSS escape \01DE goes in stylesheet strings (usually content on ::before/::after).
🤔
Did you know?
Uppercase A with diaeresis and macron is Unicode U+01DE (decimal 478) — glyph Ǟ in Latin Extended-B (U+0180–U+024F). Official name: LATIN CAPITAL LETTER A WITH DIAERESIS AND MACRON. HTML5 has no named entity — use Ǟ or Ǟ. Lowercase pair is U+01DF (ǟ). Do not confuse with Ä U+00C4 (Ä) or Ā U+0100 (Ā).
