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

Transportation

Roads

London Buses route D3 London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...

, 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 Constructions Aéronautiques Émile Dewoitine was a French aircraft manufacturer established by Émile Dewoitine at Toulouse in October 1920. The company's initial products were a range of metal parasol-wing fighters which were largely ignored by th ...

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 The Pfalz D.III was a fighter aircraft used by the ''Luftstreitkräfte'' (Imperial German Air Service) during the First World War. The D.III was the first major original design from Pfalz Flugzeugwerke. Though generally considered inferior to co ...

, 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 The Great Southern and Western Railway (GS&WR) was an Irish gauge () railway company in Ireland from 1844 until 1924. The GS&WR grew by building lines and making a series of takeovers, until in the late 19th and early 20th centuries it was the ...

Irish steam locomotive * 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

Science and technology

Dihedral group of order 6 In mathematics, D3 (sometimes alternatively denoted by D6) is the dihedral group of degree 3, or, in other words, the dihedral group of order 6. It is isomorphic to the symmetric group S3 of degree 3. It is also the smallest possible non-abel ...

(''D''_''3'') *

D-brane In string theory, D-branes, short for ''Dirichlet membrane'', are a class of extended objects upon which open strings can end with Dirichlet boundary conditions, after which they are named. D-branes were discovered by Jin Dai, Leigh, and Polch ...

, a class of p-branes in theoretical physics * D-3 (video), an uncompressed composite digital video tape format *

Nikon D3 The Nikon D3 is a 12.0-megapixel professional-grade full frame (35 mm) digital single lens reflex camera (DSLR) announced by the Nikon Corporation on 23 August 2007 along with the Nikon D300 DX format camera. It was Nikon's first full-fram ...

, a professional-level digital SLR camera

Biology and medicine

ATC code D03 D03A Cicatrizants D03AA Cod-liver oil ointments D03AX Other cicatrizants :D03AX01 Cadexomer iodine :D03AX02 Dextranomer :D03AX03 Dexpanthenol :D03AX04 Calcium pantothenate :D03AX05 Hyaluronic acid :D03AX06 Becaplermin :D03AX09 Crilanomer ...

''Preparations for treatment of wounds and ulcers'', a subgroup of the Anatomical Therapeutic Chemical Classification System * Dopamine receptor D₃, a human gene * Vitamin D₃ (cholecalciferol), a type of Vitamin D *

Melanoma in situ Melanoma, also redundantly known as malignant melanoma, is a type of skin cancer that develops from the pigment-producing cells known as melanocytes. Melanomas typically occur in the skin, but may rarely occur in the mouth, intestines, or eye ...

(ICD-10 code: D03) *

Iodothyronine deiodinase Iodothyronine deiodinases ( and ) are a subfamily of deiodinase enzymes important in the activation and deactivation of thyroid hormones. Thyroxine (T4), the precursor of 3,5,3'-triiodothyronine (T3) is transformed into T3 by deiodinase activity ...

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 Data Over Cable Service Interface Specification (DOCSIS) is an international telecommunications standard that permits the addition of high-bandwidth data transfer to an existing cable television (CATV) system. It is used by many cable televisio ...

, a cable modem standard

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 ''Dhoom 3'' () is a 2013 Indian Hindi-language action thriller film written and directed by Vijay Krishna Acharya and produced by Aditya Chopra, who co-wrote the story. It stars Aamir Khan, Abhishek Bachchan, Katrina Kaif, Uday Chopra, Jacki ...

'', a 2013 Bollywood action movie

Video games

* ''

Descent 3 ''Descent 3'' (stylized as ''Descent³'') is a first-person shooter video game developed by Outrage Entertainment and published by Interplay Entertainment. It was originally released for Microsoft Windows in North America on June 17, 1999. ''Des ...

'', a 1999 computer game * ''

Diablo III ''Diablo III'' is a hack-and-slash action role-playing game developed and published by Blizzard Entertainment as the third installment in the Diablo (series), ''Diablo'' franchise. It was released for Microsoft Windows and OS X in May 2012, Play ...

'', 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 is the third video game in the ''Disgaea'' series by Nippon Ichi. It was released for the PlayStation 3 video game console. Jack Niida, Localization Director for NIS America, said, "''Disgaea 3'' will have a downloadable content feature through ...

'', a 2008/2011 game in the Disgaea series * ''

Doom 3 ''Doom 3'' is a 2004 survival horror first-person shooter video game developed by id Software and published by Activision. ''Doom 3'' was originally released for Microsoft Windows on August 3, 2004, adapted for Linux later that year, and por ...

'', a 2004 sci-fi horror first-person shooter computer game * ''

Driver 3 ''Driver 3'' (stylized as ''DRIV3R'') is a 2004 action-adventure game, the third installment in the ''Driver'' series. It was developed by Reflections Interactive, published by Atari, and released on PlayStation 2, Xbox and mobile phones in Ju ...

'', a 2004 racing, shooting, and adventure video game

Organizations

D3 Publisher is a Japanese video game developer and publisher founded on February 5, 1992. The company is known for the '' Simple'' series of budget-priced video games. Their games have been released for the Game Boy Advance, Nintendo DS, Nintendo 3DS, Ninte ...

, a Japanese video game publisher *

Daallo Airlines Daallo Airlines is a Somali-owned airline based at Dubai Airport Free Zone in Al Garhoud, Dubai, United Arab Emirates. With its main hub at the Djibouti–Ambouli International Airport, the airline operates scheduled services in the Horn of ...

, (IATA airline code), an airline based in Dubai

Other uses

Dublin 3 Dublin postal districts have been used by Ireland's postal service, known as ''An Post'', to sort mail in Dublin. The system is similar to that used in cities in Europe and North America until they adopted national postal code systems in the ...

, a Dublin, Ireland postal district *

NCAA Division III NCAA Division III (D-III) is a division of the National Collegiate Athletic Association (NCAA) in the United States. D-III consists of athletic programs at colleges and universities that choose not to offer athletic scholarships to their stu ...

, in American collegiate athletics *

USL League One USL League One (USL1) is a professional men's soccer league in the United States that had its inaugural season in 2019. The Division III league is operated by United Soccer League, the same group that operates the Division II USL Championsh ...

, 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 The voiced palato-alveolar sibilant affricate, voiced post-alveolar affricate or voiced domed postalveolar sibilant affricate, is a type of consonantal sound, used in some spoken languages. The sound is transcribed in the International Phonet ...

(former IPA symbol dʒ), a type of consonantal sound *Triple D, a term given to

King Dedede is a fictional character in Nintendo's ''Kirby'' video game series created by Masahiro Sakurai and developed by HAL Laboratory. Dedede first appeared in the 1992 video game ''Kirby's Dream Land'' as the main antagonist, but gradually became ...

given by the Nightmare Enterprise Salesman in the anime " Kirby: Right Back at Ya!"