What ⩈ means
It stacks union above a bar above intersection.
∪ means set union: elements in either set; ∩ means intersection: elements shared by both. In a formula, follow its notation for this operator's exact role.
What did math markup call ⩈?
A 1998 MathML chart lists cupbrcap as E270.
E270 was a local-use code. ISOAMSB entities helped exchange math and science symbols through SGML, a document-markup format; Unicode later assigned this one a shared character identity.
Don't confuse it with
4Questions people ask
1Why does ⩈ show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type ⩈
Windows (Word)
Alt+XType 2A48, then Alt+X to get ⩈.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “union above bar above intersection”.
Linux
Ctrl+Shift+UType 2a48, then Enter or Space.
HTML
⩈CSS
\2A48MathML 2
In a MathML 2 source declaring ISOAMSB, write `⩈` for ⩈.
Codes and encoding1 code points
HTML decimal
⩈
HTML hex
⩈
CSS content
content: "\2A48";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%A9%88
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.