What ⧻ means
It marks a stronger or threefold plus level in specialist notation.
A Japanese standards proposal from 2000 records medical uses of double plus and triple plus for two and three times an ordinary plus level. It also notes dental diagrams drawn with box-drawing symbols.
Unicode and MathML, a format for mathematical notation, list ⧻ as an operator placed between values; the surrounding formula supplies its exact rule.
Technical and niche; use it where the notation defines what the triple changes.
Font coverage varies, so fallback may change its appearance; the surrounding notation supplies context.
Don't confuse it with
1
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.
More like this
8
How to type or find ⧻
- Search it as
- three plus · double plus · medical plus · plus operator
- Shows up in
- Anything that takes text · its shape is whatever your font draws
⧻\29FBCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.