Left Half Ring Above is the combining diacritic at Unicode U+0351 (COMBINING LEFT HALF RING ABOVE). It sits above a base letter — used in phonetic and linguistic transcription (e.g. a͑).
Remember
Mark combining left half ring above
Unicode U+0351
Hex entity ͑
Decimal ͑
CSS escape \0351
Named entity (none)
Order base letter + mark → a͑
Combining marks are not standalone letters. Write the base character first, then the entity (e.g. a͑ → a͑).
Reference
Quick Reference
One table for every form you will actually use.
Form
Code
Where it goes
Hex entity
͑
HTML after the base letter
Decimal entity
͑
HTML after the base letter
CSS escape
\0351
Stylesheet content (often ::after)
Direct character
base + U+0351
UTF-8 HTML text
Named entity
—
Not defined in HTML5
When to Use Which
Situation
Use
Need an entity in HTML source
a͑ or a͑
Generated mark via ::after
content: "\0351" on an element that ends with the base letter
Using Hex Code: a͑
Using HTML Code: a͑
Using CSS Entity: a͑
Typed directly: a͑
How It Works
1. Hex:U+0351 → ͑ after the base letter. The browser combines them into a͑.
2. Decimal: same code point as 849 → ͑. Same result as hex.
3. CSS: use \0351 in content (not an HTML entity). #point::after appends the mark above the letter a.
4. Typed: in UTF-8 you can type the base letter and the combining mark directly — same visual result.
Pitfalls & Tips
Common mistakes when working with combining Left Half Ring Above.
Order
Base letter first
Write a͑, not ͑a. Combining marks follow the base.
Named?
No named entity
HTML5 does not define a named entity for U+0351. Use numeric forms.
Direction
Left vs right
Right half ring above is U+0357. Do not swap them in phonetic text.
A11y
Explain the mark
Screen readers may skip or misname combining marks. Add a note or aria-label when the diacritic carries meaning.
CSS vs HTML
Do not mix escapes
\0351 belongs in CSS. ͑ / ͑ belong in HTML after the base letter.
Fonts
Diacritic coverage
Some fonts omit U+0351. Prefer Charis SIL, Noto Sans, or another phonetics-capable face.
Compatibility
Browser Support
Left Half Ring Above (U+0351) and its entity forms (͑, ͑, CSS \\0351) are supported in modern browsers when the font includes Combining Diacritical Marks.
✓ Universal encoding
Left Half Ring Above (U+0351)
Encode with hex, decimal, or CSS escape after a base letter — same combining mark when the font supports U+0351. No named HTML entity.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+0351Full support
Bottom line: Use a͑ or a͑ in HTML. Use \\0351 only inside CSS content. Always put the base letter first.
Remember
Key Takeaways
Unicode: this mark is U+0351 (decimal 849).
HTML: use a͑ or a͑ — no named entity.
CSS: use \0351 inside content (often on ::after).
Watch out: base letter first; U+0351 ≠ U+0357 (right half ring above).
One line: base + U+0351 → a͑ / a͑ / CSS \0351.
Frequently Asked Questions
Use ͑ (hex), ͑ (decimal), or the CSS escape \0351 in the content property. There is no named HTML entity. Place the mark immediately after the base letter (e.g. a͑).
U+0351 (COMBINING LEFT HALF RING ABOVE). Hex 0351, decimal 849. It belongs to the Combining Diacritical Marks block.
No. HTML5 does not define a named entity for this combining mark. Use numeric references like ͑ or ͑.
Use it in phonetic and linguistic transcription when you need a left half-ring diacritic above a letter. Always write base letter first, then the combining mark.
HTML entities (͑ or ͑) go in markup after the base character. The CSS escape \0351 is used in stylesheets (usually in the content property of ::after). Both apply the combining mark above the letter.
U+0351 (COMBINING LEFT HALF RING ABOVE) opens toward the left above the base letter. U+0357 (COMBINING RIGHT HALF RING ABOVE) opens toward the right. They are different diacritics.
🤔
Did you know?
Left Half Ring Above is Unicode U+0351 (decimal 849) — COMBINING LEFT HALF RING ABOVE. HTML5 has no named entity. Place it after the base letter (e.g. a͑). Do not confuse it with Right Half Ring Above (U+0357), which opens the other way.
