What 𝖣 means
It is a D in a distinct mathematical sans-serif style. In a formula, 𝖣 can name a different variable—a value or object named by a letter—from plain D. The formula tells you what it represents.
Mathematical publishers used styled alphabets before Unicode encoded them. A 1999 proposal lists sans-serif Latin letters as already used by scientific and technical publishers, explaining that changing style can change a symbol’s mathematical meaning. Encoding the styles separately preserves that distinction in plain text.
Unicode encodes the mathematical sans-serif style but does not prescribe one exact design. The font supplies the drawing, so 𝖣 can look slightly different across fonts.
Use it in mathematical or technical notation when the sans-serif style distinguishes a symbol; ordinary prose should use D with font styling.
Part of the collection
Don't confuse it with
3
Related characters
2
Questions people ask
1Why might 𝖣 become a plain D?
Unicode compatibility-normalization processes called NFKC or NFKD can fold mathematical letters to their base letters. That erases the style distinction, so avoid applying them to formula text that depends on it.
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DLatin Capital Letter D𝖽Mathematical Sans-Serif Small D𝗗Mathematical Sans-Serif Bold Capital D𝙳Mathematical Monospace Capital D𝖡Mathematical Sans-Serif Capital B𝖢Mathematical Sans-Serif Capital C𝖤Mathematical Sans-Serif Capital E
µMicro SignʹGreek Numeral Sign
ـArabic Tatweel℀Account Of℁Addressed To The SubjectHow to type or find 𝖣
- Search it as
- unicode d · math d · stylized d · fancy d
- Shows up in
- Anything that takes text · its shape is whatever your font draws
𝖣\1D5A31D5A3, then press Alt+X. Microsoft's Word keyboard guide documents this hexadecimal method in 2026.Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.