What ㎚ means
It is nm in a one-cell layout form, not a different unit.
n is the SI prefix nano, and m means metre. The square layout lets Latin nm fit one character cell beside Chinese, Japanese, or Korean text.
Most square Latin unit abbreviations came from older Korean character standards; Japanese square Katakana unit words are a separate set. For everyday horizontal SI text, nm is clearer; a text-normalization process may expand ㎚ to nm, dropping the square styling.
A compact East Asian layout form; plain nm is clearer in ordinary SI writing.
Related characters
2
Questions 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.
More like this
8
How to type or find ㎚
- Search it as
- nm symbol · nanometre symbol · nanometer symbol
- Shows up in
- Anything that takes text · its shape is whatever your font draws
㎚\339ACodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.