Tilde below is the Combining Diacritical Marks character at Unicode U+0330 (COMBINING TILDE BELOW). It is a non-spacing mark placed immediately after a base letter to add a tilde under it — used in linguistics and phonetics.
Remember
Character ◌̰ (on base letter)
Unicode U+0330
Hex entity ̰
Decimal ̰
CSS escape \0330
Named entity (none)
Not the same ∼ · ñ
Hex, decimal, and CSS all produce the same combining mark. Write it right after the base letter (a̰ → a̰). There is no named entity.
Using Hex Code: a̰
Using HTML Code: ḛ
o̰ (CSS mark on o)
Example: note a̰ carefully
How It Works
1. Hex:U+0330 → ̰ right after a. The browser combines them into a̰.
2. Decimal: same code point as 816 → ̰ after e. Same combining mark.
3. CSS: use \0330 in content (not an HTML entity). #point::after appends the mark after o, producing o̰.
4. Order: the mark must follow the base letter. There is no named HTML entity for this character.
Pitfalls & Tips
Common mistakes when working with Tilde Below.
Order
Mark after the base
Write a̰, not the mark alone or before the letter. Combining marks attach to the preceding character.
Named?
No named entity
HTML5 does not define a named entity for U+0330. Use ̰ or ̰.
∼
Not the math tilde
∼ is a standalone operator (U+223C). Use U+0330 when you need a diacritic under a letter.
ñ
Not precomposed ñ
ñ is Latin small letter n with tilde above. Tilde below is a different combining mark.
Fonts
Diacritic font coverage
Some UI fonts omit less-common combining marks. Prefer a font with Combining Diacritical Marks coverage.
CSS vs HTML
Do not mix escapes
\0330 belongs in CSS strings. ̰ / ̰ belong in HTML after the base letter.
Compatibility
Browser Support
Combining tilde below (U+0330) and its entity forms (̰, ̰, CSS \\0330) are supported in all mainstream browsers. Visible glyphs depend on Combining Diacritical Marks font coverage.
✓ Universal support
Tilde Below (a̰)
Encode with hex, decimal, or CSS escape — place after the base letter for the same combining mark.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+0330 / entitiesFull support
Bottom line: Prefer ̰ or ̰ after a base letter. Use \\0330 only inside CSS content. There is no named entity.
Remember
Key Takeaways
Unicode: combining tilde below is U+0330 (decimal 816).
HTML: use ̰ or ̰after the base letter — no named entity.
CSS: use \0330 inside content to append the mark.
Watch out: combining U+0330 ≠ math ∼ ≠ precomposed ñ.
One line: base + U+0330 → a̰ / a̰ / CSS \0330.
Frequently Asked Questions
Use ̰ (hex), ̰ (decimal), or the CSS escape \0330 in content. Place the entity immediately after the base letter (e.g. a̰). There is no named HTML entity for U+0330.
U+0330 (COMBINING TILDE BELOW). Hex 0330, decimal 816. It belongs to Combining Diacritical Marks (U+0300–U+036F).
No. HTML5 does not define a named entity for this combining mark. Use numeric forms ̰ or ̰.
Use it in linguistics, phonetics, and IPA-style notation when a letter needs a tilde under it. Prefer ñ for a precomposed ñ, and ∼ for a standalone math tilde.
HTML entities (̰ or ̰) go in markup after the base character. The CSS escape \0330 goes in stylesheet strings (usually content on ::before/::after).
No. U+0330 is a combining mark under a base letter. ∼ is the tilde operator (∼). ñ is the precomposed Latin small letter n with tilde (ñ).
🤔
Did you know?
Tilde below is Unicode U+0330 (decimal 816) — COMBINING TILDE BELOW in Combining Diacritical Marks. HTML5 has no named entity — use ̰ or ̰ right after a base letter. Distinct from the math tilde operator (∼, ∼) and precomposed letters like ñ (ñ).
