Long Solidus Overlay is the combining mark at Unicode U+0338 (COMBINING LONG SOLIDUS OVERLAY). It draws a long diagonal slash through the preceding character — often used to negate math or logic symbols.
Remember
Mark combining long solidus overlay
Unicode U+0338
Hex entity ̸
Decimal ̸
Named entity (none)
CSS escape \0338
Order base + mark → ≠
Combining marks are not standalone letters. Write the base character first, then the entity (e.g. ≠ → ≠). Prefer a precomposed form such as ≠ (≠) when one exists.
Reference
Quick Reference
One table for every form you will actually use.
Form
Code
Where it goes
Hex entity
̸
HTML after the base character
Decimal entity
̸
HTML after the base character
Named entity
None
HTML5 does not define one
CSS escape
\0338
Stylesheet content (often ::after)
Direct character
base + U+0338
UTF-8 HTML text
When to Use Which
Situation
Use
Readable numeric entity in HTML
base̸
Decimal entity required
base̸
Generated overlay via ::after
content: "\0338" on an element that ends with the base
Using Hex Code: ≠
Using HTML Code: ≠
Using CSS Entity: ≠
Combined: x ∉ A
How It Works
1. Hex:U+0338 → ̸ after the base. The browser combines them into ≠.
2. Decimal: same code point as 824 → ̸. Same result as hex.
3. Named: HTML5 does not define a named entity for this mark — use hex or decimal instead.
4. CSS: use \0338 in content (not an HTML entity). #point::after appends the slash through the trailing =.
Pitfalls & Tips
Common mistakes when working with Long Solidus Overlay.
Order
Base character first
Write ≠, not ̸=. Combining marks follow the base.
Precomposed
Prefer dedicated symbols
For “not equal” use ≠ (≠). For “not element of” use ∉ (∉) when possible.
Named
No &…; name
Do not invent a name such as &longsolidusoverlay;. Use ̸ or ̸.
Look-alikes
Not U+0337 or /
U+0337 is short solidus overlay. ASCII / (U+002F) is a normal character, not a combining mark.
CSS vs HTML
Do not mix escapes
\0338 belongs in CSS. ̸ / ̸ belong in HTML.
Semicolon
End references
Always finish with ; — write ̸, not ̸.
Compatibility
Browser Support
Long Solidus Overlay (U+0338) and its entity forms (̸, ̸, CSS \\0338) are supported in all modern browsers. Overlay alignment depends on the font.
✓ Universal encoding
Long Solidus Overlay (U+0338)
Encode with hex, decimal, or CSS escape — attach after the base for a diagonal negation slash. No named entity.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerIE 9+
Yes*
U+0338Full support
Bottom line: Prefer base̸ for readable HTML. Use \\0338 only inside CSS content. Prefer precomposed symbols when available.
Remember
Key Takeaways
Unicode: this combining mark is U+0338 (decimal 824).
HTML: prefer base̸ — or use base̸. No named entity.
CSS: use \0338 inside content for generated overlays.
Watch out: base first; prefer precomposed ≠ / ∉ when available.
One line:U+0338 → base̸ / base̸ / CSS \0338 (no named entity).
Frequently Asked Questions
Use ̸ (hex), ̸ (decimal), or the CSS escape \0338 in the content property. Place the mark immediately after the base character (e.g. ≠). There is no named HTML entity.
U+0338 (COMBINING LONG SOLIDUS OVERLAY). Hex 0338, decimal 824. It belongs to the Combining Diacritical Marks block (U+0300–U+036F).
No. HTML5 does not define a named entity for U+0338. Use numeric references like ̸ or ̸.
Use it to build negated math or logic symbols when no precomposed character exists. Always write the base first, then the overlay.
HTML entities (̸ or ̸) go in markup after the base. The CSS escape \0338 is used in stylesheets (usually in the content property of ::after). Both apply the same combining slash.
Prefer precomposed forms when available (e.g. ≠ for ≠, ∉ for ∉). Use U+0338 only when you need a custom negated base that has no dedicated code point.
🤔
Did you know?
Long Solidus Overlay is Unicode U+0338 (decimal 824) — COMBINING LONG SOLIDUS OVERLAY in Combining Diacritical Marks. HTML5 has no named entity. Place it after the base (e.g. ≠ → ≠). Prefer a precomposed symbol such as ≠ (≠) when one exists.
