What ㍉ means
It represents ミリ, Japanese for the metric prefix milli-.
ミリ is written with two katakana, Japanese syllable signs. “Milli-” means one-thousandth: a millimetre is one-thousandth of a metre. The boxed character writes the prefix, not the whole unit.
Is ㍉ different from ミリ or mm?
The written forms differ; mm names millimetre, while ㍉ writes milli-.
Ordinary katakana spells the word with two characters, ミリ; ㍉ compresses them into one full-width cell. In SI notation, mm combines the symbol for milli- with the symbol for metre. Unicode compatibility normalization NFKC can turn ㍉ into ミリ, dropping the box; typesetting can also place ordinary katakana inside a full-width cell.
This belongs to a Japanese repertoire of compact unit spellings. Unicode lists Japanese encoding standards JIS X 0208-1997 and JIS X 0213-2000 among the sources for the squared-symbol repertoire; those are encoding dates, not proof of the glyph's first use.
How do I type ㍉?
A code-point input method is the surest route.
In supported Windows 11 rich-text fields, type 3349 and press AltX; shortcut support varies by application. A Japanese IME normally converts ミリ to the two ordinary katakana, not ㍉. A character map or Unicode input method can select the boxed form.
Use ㍉ when the compact Japanese form matters; ordinary prose uses ミリ, while SI notation uses symbols such as mm.
㍉ represents milli-, not millimetre; mm is the unit symbol.
Don't confuse it with
1Related characters
4
Combination ideas
3Questions people ask
2Can text normalization remove the box?
Yes. NFKC compatibility normalization can change ㍉ to ミリ, preserving the Japanese reading but losing the boxed form.
Why is ㍉ missing or shown as a box?
The active font may lack this character. A fallback font can display a missing-glyph box, but the underlying text remains ㍉.
More like this
10
Collections with ㍉
2
How to type or find ㍉
- Search it as
- miri · milli · millimeter · millimetre · ミリ
- Shows up in
- Anything that takes text · its shape is whatever your font draws
㍉\3349Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.