Double-Struck Italic Small D ⅆ

U+2146
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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 , , .

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.

Text is also available in the following languages: Español; Русский;

Unicode Name Double-Struck Italic Small D
Unicode Number
HTML Code
CSS Code
Entity ⅆ
Unicode Block Letterlike Symbols
Unicode Subblock Double-struck italic math symbols
Unicode Version 3.2 (2002)
Version 3.2
Block Letterlike Symbols
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 +
age 3.2
scripts Common
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
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