Retroflex D (, ) is a Latin letter representing the voiced retroflex plosive . Its lower-case variant – d with tail, or d with retroflex hook – is also used to represent this sound in the International Phonetic Alphabet (but in the transcription of Languages of India, the same sound may be represented by a d with dot below: ).

Ð (lowercase: d, Latin alphabet), known as crossed D or dyet, formed from base character D/d overlaid with a crossbar. Crossing was used to create eth (ð), but eth has an uncial as its base whereas d is based on the straight-backed roman d. Crossed d is a letter in the alphabets of several languages and is used in linguistics as a phonetic symbol.