What ⫀ means
The plus has no fixed reading on its own. Plain means the left set contains the right; ⫀ adds a plus. A 1999 Unicode memo groups it with subset and superset relations, recording a classification rather than an origin.
Unicode's reference drawing is not prescriptive, so fonts may vary.
Specialist set notation; read it with the author's definition.
Don't infer the plus's rule from the glyph alone.
Questions 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 or find ⫀
- Also called
- supplus · supsetplus
- Search it as
- superset plus · set relation · math symbol
- Shows up in
- Anything that takes text · its shape is whatever your font draws
⫀\2AC0Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.



