What ⯁ means
They belong to one geometric-shape family.
A 2012 proposal to add symbols to Unicode, the standard for encoding text characters, maps ⯁ to the Wingdings 2 glyph W-2191. Wingdings 2 is a font of symbols; the proposal groups it with ⯀ (a black square) and ⯂ (a turned black pentagon) among centred geometric shapes.
Don't confuse it with
4Questions people ask
1Why does ⯁ look different in some fonts?
It depends on the font: one may draw ⯁ differently, while another without its glyph may show a fallback shape or missing-character box.
How to type ⯁
Windows (Word)
Alt+XType 2BC1, 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 “black diamond centred”.
Linux
Ctrl+Shift+UType 2bc1, then Enter or Space.
HTML
⯁CSS
\2BC1Codes and encoding1 code points
HTML decimal
⯁
HTML hex
⯁
CSS content
content: "\2BC1";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E2%AF%81
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.