Double-Struck Italic Small D ⅆ
Symbol Meaning
Lowercase “d” is often used to denote diameter, distance, differential, and one of the varieties of quarks, as well as other mathematical and scientific phenomena. As for formulas and calculations, the italic 𝑑, bold small 𝐝, handwritten 𝒹 from the Mathematical Alphanumeric Symbols1D400–1D7FF are used.
Double-struck lowercase “d” is rarely seen in scientific works. This unfilled letter with a double outline is commonly used for decorative purposes in texts. Copy and paste it in your nickname or title, on a business card or promotional brochure. This letter combines well with other double-lined symbols from Unicode, such as ⅇ, ⅈ, ⅉ.
The symbol “Double-Struck Italic Small D” is included in the “Double-struck italic math symbols” subblock of the “Letterlike Symbols” block and was approved as part of Unicode version 3.2 in 2002.
| Unicode Name | Double-Struck Italic Small D |
| Unicode Number | |
| HTML Code | |
| CSS Code | |
| Entity | ⅆ |
| Plane | 0: Basic Multilingual Plane |
| Unicode Block | Letterlike Symbols |
| Unicode Subblock | Double-struck italic math symbols |
| Unicode Version | 3.2 (2002) |
| Type of paired mirror bracket (bidi) | None |
| Composition Exclusion | No |
| Case change | 2146 |
| Simple case change | 2146 |
| Math | + |
| Alphabetic | + |
| Lowercase | + |
| Cased | + |
| ID_Start | + |
| ID_Continue | + |
| XID_Start | + |
| XID_Continue | + |
| Grapheme_Base | + |
| scripts | Common |
| Other_Math | + |
| Encoding | hex | dec (bytes) | dec | binary |
|---|---|---|---|---|
| UTF-8 | E2 85 86 | 226 133 134 | 14845318 | 11100010 10000101 10000110 |
| UTF-16BE | 21 46 | 33 70 | 8518 | 00100001 01000110 |
| UTF-16LE | 46 21 | 70 33 | 17953 | 01000110 00100001 |
| UTF-32BE | 00 00 21 46 | 0 0 33 70 | 8518 | 00000000 00000000 00100001 01000110 |
| UTF-32LE | 46 21 00 00 | 70 33 0 0 | 1176567808 | 01000110 00100001 00000000 00000000 |