D3, D03, D.III, D III or D-3 may refer to:

Transportation

Roads

  • London Buses route D3, a Transport for London contracted bus route
  • D3 motorway (Czech Republic), a motorway in the Czech Republic
  • D3 road (Croatia), a state road in Croatia
  • D3 motorway (Slovakia), a motorway in northern Slovakia

Aircraft

  • Albatros D.III, a 1916 German biplane fighter aircraft
  • Dewoitine D.3, a Dewoitine aircraft
  • Dunne D.3, a British Dunne aircraft
  • Fokker D.III, a 1916 German single-seat fighter aircraft
  • Mercedes D.III, a 1914 German 6-cylinder, liquid-cooled inline aircraft engine
  • Phönix D.III, a variant of the Austro-Hungarian First World War Phönix D.I biplane fighter
  • Pfalz D.III, a 1917 German fighter aircraft
  • Schütte-Lanz D.III, a 1918 German fighter aircraft prototype
  • Siemens-Schuckert D.III, a 1917 German prototype single-seat fighter aircraft

Automobiles

  • Ford D3 platform, a full-size car automobile platform
  • Peugeot D3, a panel van manufactured from 1950 to 1955

Locomotives

  • Bavarian D III, an 1897 steam locomotive model
  • LB&SCR D3 class, an 1893 British 0-4-4 tank locomotive design
  • GS&WR Class D3, a Great Southern and Western Railway Irish steam locomotive
  • GNR Class D3, which was also classified D3 during LNER ownership
  • Pennsylvania Railroad class D3, an 1869 American steam locomotive model

Ships

  • HMS Icarus (D03), a 1936 British Royal Navy destroyer
  • HMS Ranee (D03), a 1943 British Royal Navy escort aircraft carrier
  • USS D-3 (SS-19), a 1910 US Navy submarine
  • D3-class motor torpedo boat, a Soviet motor torpedo boat class
  • City of Detroit III (known as "D-III"), a Great Lakes and Detroit River passenger paddle steamer

Science and technology

  • Dihedral group of order 6 (D<sub>3</sub>)
  • D-brane, a class of p-branes in theoretical physics
  • D-3 (video), an uncompressed composite digital video tape format
  • Nikon D3, a professional-level digital SLR camera
  • Hexamethylcyclotrisiloxane, the threefold oligomer of dimethylsiloxane

Biology and medicine

  • ATC code D03 Preparations for treatment of wounds and ulcers, a subgroup of the Anatomical Therapeutic Chemical Classification System
  • Dopamine receptor D<sub>3</sub>, a human gene
  • Vitamin D<sub>3</sub> (cholecalciferol), a type of Vitamin D
  • Melanoma in situ (ICD-10 code: D03)<!--updated code in ICD-10 Chapter II: Neoplasms but not yet in article-->
  • Iodothyronine deiodinase type III

Computing

  • d3.js, Data Driven Documents, a JavaScript library for live web graphics based on changing data
  • D3, a Pick database sold by Rocket Software
  • DOCSIS 3, a cable modem standard
  • D3, alternative name for AntiEXE, a boot sector virus

Entertainment

  • D3 Digivice, a device from the fictional anime/manga Digimon series
  • D3 (Tenchi Muyo! Ryo-Ohki), a character in the anime Tenchi Muyo!
  • D3: The Mighty Ducks, the third film in The Mighty Ducks trilogy
  • Dedication 3, a Lil' Wayne and Young Money mixtape
  • Dhoom 3, a 2013 Indian Hindi-language action film by Vijay Krishna Acharya, third part of the Dhoom film series
  • D3 (film), a 2023 Indian Tamil-language crime thriller by Balaaji

Video games

  • Descent 3, a 1999 computer game
  • Diablo III, a 2012 action role-playing game PC game by Blizzard Entertainment
  • Dirt 3, a 2011 rallying video game
  • Disciples III: Renaissance, a 2009 video game
  • Disgaea 3, a 2008/2011 game in the Disgaea series
  • Doom 3, a 2004 sci-fi horror first-person shooter computer game
  • Driver 3, a 2004 racing, shooting, and adventure video game

Organizations

  • D3 Publisher, a Japanese video game publisher
  • Daallo Airlines, (IATA airline code), an airline based in Dubai

Other uses

  • Dublin 3, a Dublin, Ireland postal district
  • NCAA Division III, in American collegiate athletics
  • USL League One, in American professional soccer, sometimes referred to as USL D3
  • d3, a three-sided die in tabletop gaming
  • d3, Mieses Opening in chess
  • Voiced palato-alveolar affricate (former IPA symbol dʒ), a type of consonantal sound

See also

  • King Dedede, a character in the Kirby video game series
  • DIII (disambiguation)
  • 3D (disambiguation)
  • DDD (disambiguation)
  • d͡ʒ, the voiced postalveolar affricate in IPA