What 𪑍 means
It is an old variant for sediment or residue.
The Shuowen Jiezi, a Chinese character dictionary completed around 100 CE, gives 𪑩 as the related form and glosses 𪑍 as 垽, the residue that settles out of liquid. The Kangxi Dictionary, completed in 1716, records 𪑍 as equivalent to 澱.
Was 𪑩 used for indigo dyeing?
Yes, a Song dynasty note records that use.
In Kenqing lu, a collection of short notes on words and everyday life, Zhao Shuxiang records 𪑩 for dyeing with indigo and says 澱 was another spelling.
Who writes 𪑍
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Questions people ask
1Why does 𪑍 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 or find 𪑍
- Search it as
- 澱 · 淀 · 𪑩 · 垽 · dian · sediment · residue · indigo
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𪑍\2A44DCodes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.

