What means
It is one pre-drawn curve tile for a text-and-graphics screen. The European display table for Sharp’s MZ-80K includes it among built-in graphic characters; the computer launched in 1978. Its screen arranged characters in a grid, so fixed shapes could make simple pictures beside text. A 2021 Unicode proposal maps this glyph to display code B5—the slot assigned to it—and includes it to preserve legacy text for exchange and emulation.
Why does it appear as a box?
The font may not include this glyph. As of 2026, a support chart for command-line terminal apps lists circle-segment support in Ghostty and VTE, but not kitty, urxvt, or xterm.js. If it appears as a missing-glyph box, the text still contains the character; the app cannot draw it with the available font.
Don't confuse it with
1Combination ideas
1Questions 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
𜰹\1CC39Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.