HTML Entity for Superset With Not Equal To (⊋)
What You'll Learn
How to display the Superset With Not Equal To symbol (⊋) in HTML using hexadecimal, decimal, named entity, and CSS escape methods. This character is U+228B (SUPERSET OF WITH NOT EQUAL TO) in the Mathematical Operators block (U+2200–U+22FF)—used for proper superset relationships in set theory.
Render it with ⊋, ⊋, the named entity ⊋, or CSS escape \228B. For example, A ⊋ B means A is a proper superset of B (contains all elements of B plus more). Do not confuse ⊋ with ⊇ (superset or equal) or ⊃ (superset of).
⚡ Quick Reference — Superset With Not Equal To
U+228BMathematical Operators
⊋Hexadecimal reference
⊋Decimal reference
⊋Most readable option
Name Value
──────────── ──────────
Unicode U+228B
Hex code ⊋
HTML code ⊋
Named entity ⊋
CSS code \228B
Block Mathematical Operators (U+2200–U+22FF)
Related U+228A = Subset with not equal to (⊊)Complete HTML Example
This example demonstrates the Superset With Not Equal To symbol (⊋) using hexadecimal code, decimal HTML code, the named entity, and a CSS content escape:
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\228B";
}
</style>
</head>
<body>
<p>Using Hexadecimal: ⊋</p>
<p>Using HTML Code: ⊋</p>
<p>Using Named Entity: ⊋</p>
<p id="point">Using CSS Entity: </p>
</body>
</html>🌐 Browser Support
The Superset With Not Equal To entity is universally supported in all modern browsers:
👀 Live Preview
See the Superset With Not Equal To symbol (⊋) rendered in different contexts:
🧠 How It Works
Hexadecimal Code
⊋ uses the Unicode hexadecimal value 228B to display the symbol. The x prefix indicates hexadecimal format.
Decimal HTML Code
⊋ uses the decimal Unicode value 8843 to display the same character. This is one of the most commonly used methods.
Named Entity
⊋ is the semantic named entity — the easiest to read in source HTML and the most self-descriptive option.
CSS Entity
\228B is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.
Same visual result
All four methods produce the glyph: ⊋. Unicode U+228B in the Mathematical Operators block (U+2200–U+22FF).
Use Cases
The Superset With Not Equal To symbol (⊋) commonly appears in:
Equations like A ⊋ B in formulas and proofs.
Proper superset relations between sets.
Research papers, proofs, and scholarly articles.
Technical documentation and math web applications.
Online courses and tutorials on set theory.
Calculator interfaces and computational tool UIs.
Conference proceedings and mathematical journals.
💡 Best Practices
Do
- Use
⊋for readable source markup - Pick one style (hex / decimal / named) per project
- Add
aria-labelfor standalone symbols in math content - Test the glyph across browsers and fonts
- Pair ⊋ with plain text on first use (e.g. “proper superset”)
Don’t
- Confuse ⊋ (proper superset) with ⊇ (superset or equal) or ⊃ (superset)
- Mix entity styles randomly in one file
- Use CSS escape
\228Binside HTML text nodes - Use HTML entities in JS (use
\u228Binstead) - Assume all fonts render ⊋ clearly at small sizes
Key Takeaways
Three HTML references all render ⊋
⊋ ⊋ ⊋For CSS stylesheets, use the escape in the content property
\228BUnicode U+228B — SUPERSET OF WITH NOT EQUAL TO
Prefer ⊋ for readability—it’s the most self-descriptive named entity
Dual symbol: ⊊ (subset with not equal to) in the same Unicode block
❓ Frequently Asked Questions
⊋ (hex), ⊋ (decimal), ⊋ (named), or \228B in CSS content. All produce ⊋.U+228B (SUPERSET OF WITH NOT EQUAL TO). Mathematical Operators block (U+2200–U+22FF). Hex 228B, decimal 8843.⊋, ⊋, or ⊋) go directly in markup. The CSS escape \228B is used in stylesheets, typically in the content property of pseudo-elements. Same visual result, different layers of the stack.Explore More HTML Entities!
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