N-Ary Union Symbol

A symbol from the Math Symbols collection. Click the symbol or the button below to copy.

Math Symbols collection

Symbol: ⋃
Unicode: U+22C3
HTML entity: ⋃
Category: Math Symbols

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64 of 96 in the math symbols collection

About the n-ary union symbol

N-Ary Union is a large, stylized capital U shape used in set theory and mathematics. It denotes the union of a collection of sets, producing a single set containing every element from any of the component sets.

This symbol is the operator counterpart to the binary union sign (∪), functioning as a summation-like notation over an indexed family of sets. It appears in textbooks, research papers, and formal logic contexts wherever generalized union operations are written.

How to type N-Ary Union

Native keyboard shortcuts for each operating system — derived from the codepoint, so the steps below are always accurate.

Windows

2 options

In Word / Outlook: type 22C3 then press Alt + X.
Anywhere: press Win + . to open the emoji & symbol picker, then search.

macOS

2 options

Enable “Unicode Hex Input” in System Settings → Keyboard, then hold Option and type 22C3.
Or: Control + Command + Space opens the Character Viewer — search by name.