What ㏚ means
㏚ is the square pr. Unicode classifies it as an “other symbol” — Unicode's shelf for signs that are neither maths, money nor punctuation and files it in the CJK Compatibility block; this site shelves it under Chinese, Japanese & Korean.
Its appearance depends on the font and text styling.
How it is encoded
㏚ is a single code point, U+33DA. In HTML that is ㏚, and in CSS \33DA.
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 ㏚
㏚\33DACodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
