What ⦏ means
It marks the opening edge of a bracketed expression.
The short stroke belongs to the bracket itself; it is not a separate operation. MathML’s 1998 character table lists lbrksld among mathematical delimiters as “left bracket, solidus bottom corner.” That entry used E29D in the private-use area; Unicode 3.2 assigned the dedicated character ⦏ in 2002. In HTML5, use ⦏; with unicode-math, enter \lbracklltick.
Don't confuse it with
2Questions 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 ⦏
- Search it as
- lbrksld · ticked square bracket · math delimiter · solidus bracket
- Shows up in
- Anything that takes text · its shape is whatever your font draws
⦏\298F⦏.unicode-math, enter \lbracklltick in a Unicode math setup.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.




