D4
Look up d4 or D4 in Wiktionary, the free dictionary.
D4, D.IV, d4 or variants may refer to:
Science and medicine
- 22-Dihydroergocalciferol, vitamin D4
- D4-isoprostane, a type of isoprostane
- ATC code D04, Antipruritics, including antihistamines, anesthetics, etc., a subgroup of the Anatomical Therapeutic Chemical Classification System
- D04, Carcinoma in situ of skin ICD-10 code
- Dopamine receptor D4, a human gene
- Octamethylcyclotetrasiloxane, called D4
Mathematics
Technology and computing
Aircraft
Transport
Rail
Road
Engines
- Mercedes D.IV, a World War I German 8-cylinder, liquid-cooled inline aircraft engine
- Mercedes D.IVa, a 1917 German 6-cylinder, water-cooled, inline aircraft engine
Media and entertainment
Other uses
- Nikon D4, a flagship DSLR from Nikon
- Caterpillar D4 a small crawler type tractor built by Caterpillar Inc.
- HMAS Voyager (D04), a 1949 Australian Navy destroyer
- HMS D4, a 1911 British submarine
- Motorway D4 (Slovakia), a motorway in southwestern Slovakia
- Peugeot D4, a French van sold between 1955 and 1965
- Dublin 4, a Dublin postcode
- d4, a 4-sided die
- d4, the second most popular opening move in chess; begins the Queen's Pawn Game
- D4, IATA code for Alidaunia airline
- D4, commonly used jargon by fans for Ddu-Du Ddu-Du, a song by K-Pop group Blackpink.
See also
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