N2 or N-2 may refer to: Dinitrogen (N₂) Arts and media A model number of the Yamaha AvantGrand piano "N2", a 2011 song by Japanese indie rock band Asian Kung-Fu Generation, on the album Landmark Network 2 (now RTÉ Two), an Irish television station, which used the branding "N2" between 1997-2004 NicoNico, a video sharing website Science and technology Biology and medicine N200 (neuroscience), an event-related potential (ERP) component in the 200-300 ms poststimulus range A non-small cell lung carcinoma staging code for Metastasis to ipsilateral mediastinal or subcarinal lymph nodes A para formaldehyde-based filling material for root canals, also called Sargenti paste A strain of the Caenorhabditis elegans var. Bristol model worm Transportation technology N2, gauges that monitor the power turbine section in a jet engine N-2, an Armenian multiple rocket launcher system N-2 rocket, a 1981 Japanese derivative of the American Delta rocket A type of large goods vehicle GNR Class N2, a 1920 British 0-6-2T steam locomotive class USS N-2 (SS-54), a 1917 N-class coastal defense submarine of the United States Navy Other uses in science and technology N2 diagram, in systems engineering, a function-to-function data interchange DSC-N2, a 2006 Sony Cyber-shot series digital camera Transit Several roads; see List of N2 roads N2 (Long Island bus) London Buses route N2 South East Airlines (IATA airline designator) Kabo Air (IATA airline designator) Carretera Nacional N-II, former name for the Route Nacional from Madrid to Barcelona and France Other uses A United States Navy term for a senior military intelligence officer N2 Gateway, a housing project along the N2 freeway in Cape Town, South Africa N2, a postcode district in the N postcode area The fourth level in the Japanese Language Proficiency Test See also NO2 (disambiguation) NII (disambiguation)