What ⹄ means
It marks omitted letters inside a word. The cited examples include a Byzantine Greek seal from the 8th/9th century and another from the 10th century.
The stacked strokes form one character. The proposal says that setting the mark with two older characters could leave their strokes misaligned; one character keeps the pair aligned.
Specialist historical punctuation for scholarship on Byzantine Greek texts.
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 ⹄
Windows (Word)
Alt+XType 2E44, then Alt+X to get ⹄.
Windows
Win+Rrun charmap for the full table, or use the emoji picker's Ω symbols tab (Win + .).
macOS
Control+Command+SpaceOpen the character viewer and search “double suspension mark”.
Linux
Ctrl+Shift+UType 2e44, then Enter or Space.
HTML
⹄CSS
\2E44Codes and encoding1 code points
HTML decimal
⹄
HTML hex
⹄
CSS content
content: "\2E44";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%B9%84
1
On screen
1
Code points
1
JS .length
3
UTF-8 bytes
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.