D

ISO basic Laitin alphabet Aa Bb Cc Dd Ee Ff Gg Hh Ii Jj Kk Ll Mm Nn Oo Pp Qq Rr Ss Tt Uu Vv Ww Xx Yy Zz

Cursive script 'd' and capital 'D' in the U.S. D'Nealian script style

Seembol "D" is 500 in Roman numerals.

Egyptian hieroglyph  door	Phoenician daleth	Greek Delta	Etruscan  D	Roman D

The Semitic letter Dâlet mey hae developed frae the logogram for a fish or a door. Thare various Egyptian hieroglyphs that micht hae inspired this. In Semitic, Auncient Greek an Latin, the letter representit /d/; in the Etruscan alphabet the letter wis superfluous but still retained (see letter B). The equivalent Greek letter is Delta, 'Δ'.

The minuscule (lawer-case) fairm o 'd' consists o a luip an a taw vertical stroke. It developed bi gradual variations on the majuscule (caipital) form. In haundwritin, it wis common tae stairt the arc tae the left o the vertical stroke, resultin in a serif at the tap o the arc. This serif wis extendit while the rest o the letter wis reduced, resultin in an angled stroke an luip. The angled stroke slawly developed intae a vertical stroke.

In naur aw leids that uise the Latin alphabet an the Internaitional Phonetic Alphabet 'd' represents the voiced alveolar or voiced dental plosive /d/, but in the Vietnamese alphabet, it represents the soond /z/ (or /j/ in soothren dialects). In Fijian it represents a prenasalized stap /nd/. In some leids whaur voiceless unaspirated staps contrast wi voiceless aspiratit staps, 'd' represents an unaspirated /t/, while 't' represents an aspirated /tʰ/. Examples o sic leids include Icelandic, Scottish Gaelic, Navajo, Estonie an the Pinyin transleeteration o Mandarin.

• Đ đ : Latin letter D wi stroke
• Ɗ ɗ : Latin letter D wi huik
• Ð ð : Latin letter Eth
• Δ δ : Greek letter Delta
• Д д : Cyrillic letter De
• ∂ : the partial derivative seembol, ${\displaystyle \partial }$

¹ An aa for encodings based on ASCII, includin the DOS, Windows, ISO-8859 an Macintosh faimilies o encodings.

NATO phonetic	Morse code
Delta	–··

		[[File:Sign language {{{fingerspelling}}}.svg|90px]]
Seegnal banner	Banner semaphore	American manual alphabet (ASL fingerspellin)	Braille dots-145

In Breetish Sign Leid (BSL), the letter 'd' is indicatit bi signin wi the richt haund held wi the index an thumb extendit an slichtly curved, an the tip o the thumb an finger held against the extendit index o the left haund.