Contains as member (∋) is the Unicode character at U+220B in the Mathematical Operators block. It means a set contains an element — the reverse writing order of element of (∈): A ∋ x means the same as x ∈ A.
Remember
Character ∋
Unicode U+220B
Hex entity ∋
Decimal ∋
Named entity ∋ / ∋ / ∋ / ∋
CSS escape \220B
Not the same ∈ U+2208 · ∍ U+220D
All of these produce the same glyph: ∋. Prefer ∋ or a typed ∋ in hand-written HTML; use numeric forms when generating markup.
Contains as member rendered in common math contexts.
Inline mathA∋x
Large glyph∋
Compared∋ ∈ ∍
Same idea, flippedA ∋ x = x ∈ A
With entitiesNamed: ∋ | Hex: ∋ | Decimal: ∋
Code
Complete HTML Example
One page that shows Contains As Member with the named entity, hex entity, decimal entity, CSS escape, and a typed character. Use View Output or open the live editor.
Named + Hex + Decimal + CSS + Typed
Five ways to produce ∋ in a single document.
html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Contains As Member (∋) in HTML</title>
<style>
#point::after {
content: "\220B";
}
</style>
</head>
<body>
<p>Contains as member using Named Entity: ∋</p>
<p>Contains as member using Hex Code: ∋</p>
<p>Contains as member using HTML Code: ∋</p>
<p id="point">Contains as member using CSS Entity: </p>
<p>Typed directly: ∋</p>
</body>
</html>
Contains as member using Named Entity: ∋
Contains as member using Hex Code: ∋
Contains as member using HTML Code: ∋
Contains as member using CSS Entity: ∋
Typed directly: ∋
How It Works
1. Named:∋ (aliases ∋, ∋, ∋) is the HTML5 named reference for U+220B → ∋.
2. Hex:U+220B → ∋ in HTML. Same glyph as the named form.
3. Decimal: same code point as 8715 → ∋. Same result as hex.
4. CSS: use \220B in content (not an HTML entity). #point::after appends that ∋ after the paragraph text.
5. Typed: in a UTF-8 page you can paste ∋ directly. All five lines show the same glyph.
Pitfalls & Tips
Common mistakes when working with Contains As Member.
Order
∋ vs ∈
Write A∋x (set first) or x∈A (element first). Same membership idea; different symbol and word order.
Named
Several aliases
∋, ∋, ∋, and ∋ all produce ∋. Pick one and stay consistent.
Small
Not U+220D
∍ is small contains as member. Use U+220B for the standard full-size glyph.
CSS vs HTML
Do not mix escapes
\220B belongs in CSS. ∋ / ∋ / ∋ belong in HTML.
Fonts
Math font coverage
Some fonts omit U+220B. Prefer a font with Mathematical Operators coverage for display.
Semicolon
End references
Always finish with ; — write ∋ and ∋, not bare forms.
Compatibility
Browser Support
Contains as member (U+220B) and its entity forms (∋, ∋, ∋, CSS \\220B) are supported in all mainstream browsers. Visible glyphs depend on font coverage.
✓ Universal support
Contains As Member (∋)
Encode with named, hex, decimal, CSS escape, or type the character — same glyph everywhere encoding is supported.
100%Browser coverage
Google ChromeSupported
Yes
Microsoft EdgeSupported
Yes
Mozilla FirefoxSupported
Yes
Apple SafariSupported
Yes
OperaSupported
Yes
Internet ExplorerAll versions
Yes
U+220B / entitiesFull support
Bottom line: Prefer ∋ or typed ∋ in HTML. Use \\220B only inside CSS content. Prefer ∈ when writing element-first membership.
Remember
Key Takeaways
Unicode: contains as member is U+220B (decimal 8715) — glyph ∋.
HTML: use ∋ (or aliases), ∋, ∋, or type ∋.
CSS: use \220B inside content for generated text.
Watch out:∋ ≠ ∈ ≠ ∍ (contains ≠ element of ≠ small).
One line:U+220B → ∋ / ∋ / CSS \220B / type ∋.
Frequently Asked Questions
Use ∋ (hex), ∋ (decimal), ∋ / ∋ / ∋ / ∋ (named), or the CSS escape \220B in the content property. All render ∋. You can also paste ∋ directly when your file is UTF-8.
U+220B (hex 220B, decimal 8715). It belongs to the Mathematical Operators block and is the reverse-direction membership symbol relative to ∈ (U+2208).
Yes. ∋, ∋, ∋, and ∋ are HTML5 named references for ∋. Numeric forms ∋ and ∋ also work.
Use it in set-theory or math pages when the set is written on the left (A ∋ x). Prefer ∈ (element of) when the element is written on the left (x ∈ A) — the usual order in many textbooks.
HTML entities (∋, ∋, or ∋) go in markup. The CSS escape \220B goes in stylesheet strings (usually content on ::before/::after).
∋ (U+220B) is contains as member. ∈ (U+2208) is element of (flipped order). ∍ (U+220D) is small contains as member — a smaller variant glyph.
🤔
Did you know?
Contains as member is Unicode U+220B (decimal 8715) — glyph ∋ in the Mathematical Operators block. HTML named references are ∋, ∋, ∋, and ∋. It is the reverse of element of ∈ (U+2208): A ∋ x means the same membership as x ∈ A.
