HTML Entity for Multiset Multiplication (⊍)

Beginner

5 min read

Updated: Sep 2026

1 example

Unicode U+228D

HTML Entity for Multiset Multiplication (U+228D) tutorial illustration

Definition

What Is the Multiset Multiplication Entity?

Multiset Multiplication (⊍) is the mathematical bag operator at Unicode U+228D. HTML5 provides &cupdot;. Use it for multiset multiplication, for example A ⊍ B.

Remember

Character     ⊍
Unicode       U+228D
Named entity  &cupdot;
Hex entity    &#x228D;
Decimal       &#8845;
CSS escape    \228D

Named, hex, decimal, CSS, and a typed character all produce the same glyph: ⊍.

Reference

Quick Reference

One table for every form you will actually use.

Form	Code	Where it goes
Named entity	`&cupdot;`	HTML markup (preferred)
Direct character	`⊍`	UTF-8 HTML text
Hex entity	`⊍`	HTML markup
Decimal entity	`⊍`	HTML markup
CSS escape	`\228D`	Stylesheet `content`

When to Use Which

Situation	Use
Multiset / bag multiplication	`&cupdot;`
Need an entity in HTML source	`&cupdot;`, `⊍`, or `⊍`
Generated text via `::before` / `::after`	`content: "\228D"`
Multiset symbol (⊌)	See Multiset
Multiset union (⊎)	See Multiset Union — `&uplus;`

See it

Live Preview

Multiset Multiplication in a short operation and beside related symbols.

Example A ⊍ B

Large glyph ⊍

Named entity &cupdot; → ⊍

vs ⊌ / ⊎ ⊍ | ⊌ | ⊎

With entities Named: ⊍ | Hex: ⊍ | Decimal: ⊍

Code

Complete HTML Example

One page that shows Multiset Multiplication with named, hex, decimal, and CSS forms. Use View Output or open the live editor.

Named + Hex + Decimal + CSS

Four ways to produce ⊍ in a single document.

html

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Multiset Multiplication (⊍)</title>
  <style>
    #point::after {
      content: "\228D";
    }
  </style>
</head>
<body>
  <p>Using Named Entity: &cupdot;</p>
  <p>Using Hex Code: &#x228D;</p>
  <p>Using HTML Code: &#8845;</p>
  <p id="point">Using CSS Entity: </p>
  <p>Operation: A &cupdot; B</p>
</body>
</html>

Try It Yourself

How It Works

1. Named: &cupdot; is the clearest HTML form and renders ⊍.

2. Hex: U+228D → ⊍ in HTML. Same result as the named entity.

3. Decimal: same code point as 8845 → ⊍. Same result as hex and named.

4. CSS: use \228D in content (not an HTML entity). #point::after appends that ⊍ after the paragraph text.

Pitfalls & Tips

Common mistakes when working with Multiset Multiplication.

Prefer

Use `&cupdot;`

The named form is clearer than numeric references and is defined in HTML5.

vs ×

Not ordinary multiplication

× is × for arithmetic. &cupdot; is ⊍ for multiset (bag) multiplication.

vs ∪

Not set union

∪ is ∪. Multiset union is &uplus; (⊎). Multiset multiplication is &cupdot;.

CSS vs HTML

Do not mix escapes

\228D belongs in CSS. &cupdot; / ⊍ / ⊍ belong in HTML.

Encoding

Declare UTF-8

If you type ⊍ directly, keep <meta charset="UTF-8"> so the file is not misread.

Semicolon

End references

Always finish with ; — write &cupdot;, not &cupdot.

Compatibility

Browser Support

Multiset Multiplication (U+228D) and its entity forms (&cupdot;, ⊍, ⊍, CSS \\228D) are supported in all mainstream browsers with a Unicode-capable font.

✓ Universal support

Multiset Multiplication (&cupdot;)

Encode with named, hex, decimal, or CSS escape — or type ⊍ directly in UTF-8 HTML.

100% Browser coverage

Google Chrome Supported

Yes

Microsoft Edge Supported

Yes

Mozilla Firefox Supported

Yes

Apple Safari Supported

Yes

Opera Supported

Yes

Internet Explorer IE 9+

Yes*

U+228D / &cupdot; Full support

Bottom line: Prefer &cupdot; in mathematical HTML. Use \\228D only inside CSS content.

Remember

Key Takeaways

Unicode: Multiset Multiplication is U+228D (decimal 8845).
HTML: prefer &cupdot;.
CSS: use \228D inside content for generated text.
Family: pair with ⊌ (multiset) and ⊎ (&uplus;).

One line: U+228D → prefer &cupdot; (also ⊍ / CSS \228D).

Frequently Asked Questions

How do I display Multiset Multiplication in HTML using entities?

Use &cupdot; (named), ⊍ (hex), ⊍ (decimal), or the CSS escape \228D in the content property. All render ⊍. Prefer &cupdot; in mathematical HTML.

What is the Unicode value for Multiset Multiplication?

U+228D (MULTISET MULTIPLICATION). Hex 228D, decimal 8845. It belongs to the Mathematical Operators block.

Is there a named HTML entity for U+228D?

Yes. HTML5 defines &cupdot; for ⊍.

When should I use this HTML entity?

Use it in set theory and combinatorics for multiset (bag) multiplication — for example A ⊍ B.

What is the difference between HTML code and CSS entity for U+228D?

HTML entities (&cupdot;, ⊍, or ⊍) go in markup. The CSS escape \228D is used in stylesheets (usually in the content property of ::before/::after). Both render ⊍.

Is ⊍ the same as × or ∪?

No. Multiset Multiplication is &cupdot; (⊍, U+228D). Ordinary multiplication is × (×). Set union is ∪ (∪). Different operators.

Did you know?

Multiset Multiplication is Unicode U+228D (decimal 8845) — MULTISET MULTIPLICATION in Mathematical Operators. HTML5 provides &cupdot;. It is a bag/multiset operator (A ⊍ B), related to Multiset ⊌ and Multiset Union &uplus; (⊎).

Next: Multiset Union

Continue with the Multiset Union (⊎) entity tutorial.

Multiset Union tutorial →

About the author

Mari Selvan M P 🔗

Developer, cloud engineer, and technical writer

Experience 12 years building web and cloud systems
Focus Full Stack Development, AWS, and Developer Education

I write practical tutorials so students and working developers can learn by doing—from databases and APIs to deployment on AWS.

AWS Certified Developer – Associate (Credly)

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