HTML Entity for Subset With Not Equal To (⊊)
What You'll Learn
How to display the Subset With Not Equal To symbol (⊊) in HTML using hexadecimal, decimal, and CSS escape methods. This character is U+228A (SUBSET OF WITH NOT EQUAL TO) in the Mathematical Operators block (U+2200–U+22FF)—the standard notation for a proper subset (subset, but not equal).
Render it with ⊊, ⊊, or CSS escape \228A. There is no named HTML entity. For example, A ⊊ B means every element of A is in B, but A ≠ B. Do not confuse ⊊ with ⊆ (subset or equal) or ⊂ (subset).
⚡ Quick Reference — Subset With Not Equal To
U+228AMathematical Operators
⊊Hexadecimal reference
⊊Decimal reference
—Use numeric codes only
Name Value
──────────── ──────────
Unicode U+228A
Hex code ⊊
HTML code ⊊
Named entity (none)
CSS code \228A
Block Mathematical Operators (U+2200–U+22FF)
Related U+2286 = Subset or equal to (⊆)
U+228B = Superset with not equal to (⊋)Complete HTML Example
This example demonstrates the Subset With Not Equal To symbol (⊊) using hexadecimal code, decimal HTML code, and a CSS content escape (no named entity):
<!DOCTYPE html>
<html>
<head>
<style>
#point:after{
content: "\228A";
}
</style>
</head>
<body>
<p>Subset With Not Equal To using Hexadecimal: ⊊</p>
<p>Subset With Not Equal To using HTML Code: ⊊</p>
<p id="point">Subset With Not Equal To using CSS Entity: </p>
</body>
</html>🌐 Browser Support
The Subset With Not Equal To entity is universally supported in all modern browsers:
👀 Live Preview
See the Subset With Not Equal To symbol (⊊) rendered in different contexts:
🧠 How It Works
Hexadecimal Code
⊊ uses the Unicode hexadecimal value 228A to display the Subset With Not Equal To symbol. The x prefix indicates hexadecimal format.
Decimal HTML Code
⊊ uses the decimal Unicode value 8842 to display the same character. This is one of the most commonly used methods.
CSS Entity
\228A is used in CSS stylesheets, particularly in the content property of pseudo-elements like ::before and ::after.
Same visual result
All three methods produce the glyph: ⊊. Unicode U+228A in the Mathematical Operators block (U+2200–U+22FF). No named entity.
Use Cases
The Subset With Not Equal To symbol (⊊) commonly appears in:
Equations like A ⊊ B for proper subsets.
Textbooks and papers on strict inclusion 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
⊊or⊊for proper-subset notation - Pick one style (hex or decimal) per project for consistency
- Use ⊊ when sets must be unequal (strict inclusion)
- Add
aria-labelfor standalone symbols in math content - Test the glyph across browsers and fonts
Don’t
- Confuse ⊊ (proper subset) with ⊆ (subset or equal)
- Put CSS escape
\228Adirectly in HTML text nodes - Expect a named HTML entity for U+228A—use numeric references
- Use HTML entities in JS (use
\u228Ainstead) - Assume all fonts render ⊊ clearly at small sizes
Key Takeaways
Two HTML references both render ⊊
⊊ ⊊For CSS stylesheets, use the escape in the content property
\228AUnicode U+228A — SUBSET OF WITH NOT EQUAL TO
No named entity—use numeric references or CSS escape
Denotes a proper subset: A ⊊ B means A ⊆ B and A ≠ B
❓ Frequently Asked Questions
⊊ (hex), ⊊ (decimal), or \228A in CSS content. There is no named HTML entity. All three produce ⊊.U+228A (SUBSET OF WITH NOT EQUAL TO). Mathematical Operators block (U+2200–U+22FF). Hex 228A, decimal 8842.⊊ or ⊊) go directly in markup. The CSS escape \228A is used in stylesheets, typically in the content property of pseudo-elements. Same visual result, different layers of the stack.Explore More HTML Entities!
Discover 1500+ HTML character references — set theory, math operators, and more.
About the author
8 people found this page helpful