What ⦖ means
It marks where the bracketed expression ends.
Its matching opener is ⦕. Read the pair as punctuation around a mathematical group: the marks set the boundary, while the notation gives the group its role.
Why was ⦖ included in mathematical character encoding?
It was proposed to complete the mathematical symbols needed by publishers.
In 2000, a proposal to extend ISO/IEC 10646, an international character-encoding standard aligned with Unicode, listed ⦖ among additional mathematical symbols. The proposal grew from STIX (Scientific and Technical Information eXchange), a publishing effort to develop shared mathematical fonts and make scientific and technical documents easier to exchange.
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 ⦖
⦖\2996Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
