Combining plus sign below is Unicode U+031F (COMBINING PLUS SIGN BELOW. It is a non-spacing mark placed immediately after a base letter to add a plus-like mark under it — often in IPA and linguistics.
Remember
Character ◌̟ (under base letter)
Unicode U+031F
Hex entity ̟
Decimal ̟
CSS escape \031F
Named entity (none)
Hex, decimal, and CSS all produce the same combining mark. Write it right after the base letter (a̟ → a̟).
Using Hex Code: x̟
Using HTML Code: a̟
z̟ (CSS mark on z)
Compare: math + vs diacritic a̟
How It Works
1. Hex:U+031F → ̟ right after x. The browser combines them into x̟.
2. Decimal: same code point as 799 → ̟ after a. Same combining mark.
3. CSS: use \031F in content (not an HTML entity). #point::after appends the mark after z, producing z̟.
4. Compare:+ is a spacing math operator; ̟ is a diacritic under a letter.
Pitfalls & Tips
Common mistakes when working with combining plus sign below.
Order
Base letter first
Write a̟, not ̟a. The mark attaches to the preceding character.
Named?
No named entity
HTML5 does not define a named entity for U+031F. Use numeric forms.
vs +
Not mathematical plus
Use + for equations. This character is only a combining diacritic.
Sibling
Not minus below
Combining minus sign below is U+0320 — a different mark under the letter.
CSS vs HTML
Do not mix escapes
\031F belongs in CSS. ̟ / ̟ belong in HTML.
Semicolon
End references
Always finish with ; — write ̟, not ̟.
Compatibility
Browser Support
Combining plus sign below (U+031F) and its numeric entity forms (̟, ̟, CSS \\031F) are supported in all mainstream browsers with Unicode combining-mark support.
✓ Universal support
Plus Sign Below (U+031F)
Encode with hex, decimal, or CSS escape — place after the base letter for the same combining mark under the glyph.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerIE 9+
Yes*
U+031F / entitiesFull support
Bottom line: Use ̟ or ̟ after a base letter when you need the mark below. Use \\031F only inside CSS content. Prefer + for math addition.
Remember
Key Takeaways
Unicode: combining plus sign below is U+031F (decimal 799).
HTML: use ̟ or ̟ immediately after the base letter.
CSS: use \031F inside content for generated text.
Do not confuse: math uses +; this mark is a diacritic only.
One line:U+031F → place ̟ / ̟ / CSS \031F after the base letter.
Frequently Asked Questions
Use ̟ (hex), ̟ (decimal), or the CSS escape \031F in the content property. Place the entity immediately after the base letter (e.g. a̟). There is no named HTML entity for U+031F.
U+031F (COMBINING PLUS SIGN BELOW). Hex 031F, decimal 799. It belongs to the Combining Diacritical Marks block.
No. U+031F has no named HTML entity. Use numeric references like ̟ or ̟.
Use it in IPA, linguistics, and specialized notation when a plus-like mark under a letter is required — not as a substitute for the spacing plus sign or UI decoration.
HTML entities (̟ or ̟) go in markup after the base character. The CSS escape \031F is used in stylesheets (usually in the content property of ::before/::after). Both render the same combining mark.
No. + is the spacing plus sign (+, U+002B). Combining minus sign below is U+0320. This mark is U+031F, a combining diacritic under a letter.
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Did you know?
Combining plus sign below is Unicode U+031F (decimal 799) — in Combining Diacritical Marks. HTML5 has no named entity for it — use ̟ or ̟ right after a base letter. Not the same as mathematical plus + (+) or combining minus below (U+0320).
