D2

{{wiktionary|d2|D2}} '''D2''', '''D02''', '''D.II''', '''D II''' or '''D-2''' may refer to:

{{TOC right}}

==Places== * Dublin 2, a Dublin, Ireland postcode * Mount Dulang-dulang, the second highest mountain of the Philippines * D2, a line of Moscow Central Diameters * D2 Place One and Two, at Cheung Yue Street and Cheung Shun Street, in Cheung Sha Wan, MTR Lai Chi Kok Station Exit D1 and D2.

===Highways=== * D2 motorway (Czech Republic) * D2 road (Croatia), a state route in Croatia * D2 motorway (Slovakia)

==Arts & entertainment== * ''D-2'' (mixtape), a 2020 album by South Korean rapper Agust D * ''D2: The Mighty Ducks'', the second film in ''The Mighty Ducks'' trilogy * R2-D2, a robotic ''Star Wars'' character * "D²", a 2002 episode of ''Dexter's Laboratory'' * ''D2'' (video game), a 1999 game for the Sega Dreamcast * ''D2'', an abbreviation of the video game ''Diablo II'' or ''Destiny 2'' * D2, a sub-group of the Japanese male acting troupe D-Boys * ''Dhoom 2'', a 2006 Indian Hindi-language action film by Sanjay Gadhvi, second part of the ''Dhoom'' film series

==Business== * D2 (hotel chain), owned by Dusit Thani Group * D2 Mannesmann, the former name of Vodafone's German division, which resulted from the acquisition of the German company Mannesmann AG * ''D2'' (magazine), published by ''Dagens Næringsliv'' * D2, formerly the IATA code for defunct Damania Airways * D2, the IATA airline code for Severstal Avia

==Biology or medicine== * ATC code D02 Emollients and protectives, a subgroup of the Anatomical Therapeutic Chemical Classification System * Dopamine receptor D₂, a protein * Levuglandin D2 * Prostaglandin D₂ receptor, a G-protein coupled receptor * Resolvin D2 * Cyclin D2 (CCND2) * Vitamin D₂, or ergocalciferol * D02, the ICD-10 code for carcinoma in situ of middle ear and respiratory system * DIO2, Type II iodothyronine deiodinase, an enzyme involved in the thyroid system

==Vehicles==

===Aircraft=== * Albatros D.II, a 1916 German fighter aircraft * Aviatik (Berg) D.II, a 1917 Austro-Hungarian fighter prototype * STS-55 or D2, the second German-sponsored Spacelab mission * Daimler D.II, a Daimler aircraft * Delta D2, an Australian diesel-powered helicopter design * Dunne D.2, a British Dunne aircraft * Euler D.II, a 1917 German single-seat fighter * Fokker D.II, a WWI German fighter biplane * Halberstadt D.II, a 1916 German biplane fighter aircraft * Hughes D-2, a 1943 mysterious American fighter and bomber project * LFG Roland D.II, a 1917 German single-seat fighter * Phönix D.II, a variant of the Hungarian First World War biplane fighter D.I * Schütte-Lanz D.II, a 1915 variant of the German Schütte-Lanz D.I aircraft

===Aircraft engines=== * Alfa Romeo D2, a 1931 Italian nine-cylinder radial engine for aircraft use * Mercedes D.II, a WWI 6-cylinder, liquid-cooled inline aircraft engine

===Locomotives=== * Bavarian D II, an 1898 German goods train tank locomotive model * Bavarian D II (Ostbahn), an 1866 German goods train tender locomotive model * Bavarian D II (old), an 1873 small tank locomotive * GS&WR Class D2, a Great Southern and Western Railway Irish steam locomotive * LB&SCR D2 class, a British locomotive class * GNR Class D2, a class of British steam locomotives * PRR D2, an 1868 American steam locomotive model

===Ships=== * HMS ''Attacker'' (D02), a 1941 American-built escort aircraft carrier * HMS ''Devonshire'' (D02), a 1962 County-class destroyer * HMS ''Inglefield'' (D02), a 1936 I-class destroyer and flotilla leader of the British Royal Navy * {{USS|D-2|SS-18}}, a 1909 American submarine

===Other vehicles=== * Char D2, a French tank * Zhidou D2, a Chinese small electric car

== Electronics== * Cowon D2, a 2007 portable media player with touch screen interface * Datasaab D2, a Swedish concept computer completed in 1960 * ''d2'', a brand of computer peripherals manufactured by the French firm {{Lang|fr|électronique d2}}, now trading as LaCie * D2 kit, a microprocessor development kit MEK6800D2 * D-2 (video), a professional digital video format * DOCSIS 2, a cable modem standard

==Other uses== * D₂, the Codex Claromontanus, a 6th-century Greek-Latin uncial manuscript of the New Testament * D₂, a dihedral group in group theory * D₂, deuterium, an isotope of hydrogen * D2, an almond-shaped cloud on Neptune * D2, the code for permission to use specific land or premises for leisure (cinemas, swimming baths, gymnasiums) in town and country planning in the United Kingdom * D2, the Double Dragon hacking group * Division II (disambiguation), in sports leagues, etc. * Marcelo D2 (born 1967), Brazilian rapper * D2, an abbreviation for DOCSIS 2.0, an international telecommunications standard * D2 steel, a type of D-Grade tool steel with good wear resistance commonly found in shears and high-end knives * D2, gaming notation for a 2-sided die, such as a coin * D2, a standard paper size between B2 and A1 * D2 Subway, a planned Dallas, Texas light rail tunnel * D2, a route of the D (SEPTA Metro)

==See also== * 2D (disambiguation) * DII (disambiguation)

{{Letter-Number Combination Disambiguation}}