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

Transportation

Roads

London Buses route D3 This is a list of Transport for London (TfL) contracted London Buses, bus routes in London, England, as well as commercial services that enter the Greater London area (except Coach (vehicle), coaches). Bus services in London are operated by A ...

, a Transport for London contracted bus route *

D3 motorway (Czech Republic) The D3 motorway () is a motorway in the Czech Republic. Once completed, the motorway will connect Prague with the Austrian ''Mühlviertler Schnellstraße, Mühlviertel Expressway'' (S10) to Linz. As of December 2024, only the middle section () o ...

, 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 in Toulouse by Émile Dewoitine in October 1920. The company's initial products were a range of metal parasol-wing fighters, which were largely ignored by ...

aircraft * Dunne D.3, a British Dunne aircraft *

Fokker D.III The Fokker D.III (Fokker designation M.19) was a German single-seat fighter aircraft of World War I. It saw limited frontline service before being withdrawn from combat in December 1916. Design and development The M.19 began as an effort to imp ...

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

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

Science and technology

Dihedral group of order 6 In mathematics, D3 (sometimes alternatively denoted by D6) is the dihedral group of degree (permutation group), degree 3 and Order of a group, order 6. It equals the symmetric group S3. It is also the smallest non-abelian group.. For the ident ...

(''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 are typically classified by their spatial dimensi ...

, a class of p-branes in theoretical physics *

D-3 (video) D-3 is an uncompressed composite digital video format invented at NHK and introduced commercially by Panasonic. It was launched in 1991 to compete with Ampex's D-2. Overview D-3 uses half-inch metal particle tape at 83.88 mm/s (compar ...

, 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-fr ...

, a professional-level digital SLR camera *

Hexamethylcyclotrisiloxane Hexamethylcyclotrisiloxane, also known as D3 and D3, is the organosilicon compound with the formula . It is a colorless or white volatile solid. It finds limited use in organic chemistry. The larger tetrameric and pentameric siloxanes, respective ...

, the ''three''fold oligomer of ''d''imethylsiloxane

Biology and medicine

* ATC code D03 ''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 (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 D3.js (also known as D3, short for Data-Driven Documents) is a JavaScript library for producing dynamic, interactive data visualizations in web browsers. It makes use of Scalable Vector Graphics (SVG), HTML5, and Cascading Style Sheets (CSS) stan ...

, 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 ''Dedication 3'' is the eighth mixtape by American rapper Lil Wayne, hosted by DJ Drama. It is the sequel to its predecessors, '' The Dedication'' and the highly successful '' Dedication 2'', becoming the third in Lil Wayne's "Gangsta Grillz" ser ...

'', 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 ''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. ''De ...

'', a 1999 computer game * ''

Diablo III ''Diablo III'' is a 2012 online-only action role-playing dungeon crawling game developed and published by Blizzard Entertainment as the third installment in the ''Diablo'' franchise. It was released for Microsoft Windows and OS X in May 2012, ...

'', 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 throug ...

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

Doom 3 ''Doom 3'' is a 2004 first-person shooter, first-person shooter 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 Vide ...

'', 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 Jun ...

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

Organizations

D3 Publisher is a Japanese video game developer and video game publisher, publisher founded on February 5, 1992. The company is known for the ''Simple (video game series), Simple'' series of budget-priced video games. Their games have been released for the G ...

, 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 NCAA Division III (D-III) is the lowest division of the National Collegiate Athletic Association (NCAA) in the United States. D-III consists of athletic programs at colleges and universities that do not offer athletic scholarships to student- ...

, in American collegiate athletics *

USL League One USL League One (USL1) is a professional men's association football, soccer league in the United States that had its inaugural season in 2019 USL League One season, 2019. The United States soccer league system, Division III league is operated ...

, 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