What ㌦ means
It means Japanese ドル, “dollar.” Katakana is a Japanese script often used for borrowed words; the square gives the word one character-width.
NEC’s additions to Japan’s JIS C 6226 character standard (1978) include it; Shift-JIS, an older Japanese encoding, places it on row 13. Unicode retains the square form for older text compatibility.
In vertical Japanese text, fonts may arrange its kana differently inside the square.
Don't confuse it with
1Questions people ask
1Why does ㌦ 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 ㌦
Windows (Word)
Alt+XType 3326, then Alt+X to get ㌦.
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 “square doru”.
Linux
Ctrl+Shift+UType 3326, then Enter or Space.
HTML
㌦CSS
\3326Codes and encoding1 code points
HTML decimal
㌦
HTML hex
㌦
CSS content
content: "\3326";
Each escape is closed by the next backslash; a trailing space is needed before a literal hex digit.
URL encoded
%E3%8C%A6
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.