Ra is the Sun-god of Ancient Egypt. Ra or RA may also refer to:

Arts and entertainment

Film and television

Ra (Stargate) Over its decade of existence, science fiction TV series ''Stargate SG-1'' developed an extensive and detailed backdrop of diverse characters. Many of the characters are members of alien species discovered while exploring the galaxy through the S ...

, a character from the film ''Stargate'', based on the Egyptian god * Ra (1972 film), ''Ra'' (1972 film), a 1972 documentary film about Thor Heyerdahl's expeditions * Ra (2014 film), ''Ra'' (2014 film), a Tamil fantasy film

Gaming

* ''Rocket Arena (mod), Rocket Arena'', a ''Quake'' mod * ''Command & Conquer: Red Alert'', a game

Music

* A half-step below Re on the solfège musical scale

Performers

* Ra (band), an American rock band * Ra (musician), the pseudonym of Raoul Sinier, a French digital painter and electronic musician * R.A. the Rugged Man (born c. 1974), American rapper * Sun Ra (1914–1993), American jazz musician and philosopher * Rise Against, an American punk/hardcore band

Albums

* Ra (Utopia album), ''Ra'' (Utopia album), 1977 * Ra (Eloy album), ''Ra'' (Eloy album), 1988

Songs

* "Ra", a song by Northlane from ''Node (Northlane album), Node'', 2015 * Ra (Inna song), 2018

Other media

* ''Ra'', a novel by qntm * Ra (board game), a board game for two to five players designed by Reiner Knizia and based on ancient Egyptian culture * ''Resident Advisor'', an online magazine

Businesses and organizations

Academia

* Resource Academia, an academic institution in Lahore, Pakistan * Roosevelt Academy, a college in the Netherlands * Royal Academy of Arts, in London, UK ** Royal Academician, one of the 80 practicing artists elected as a member of the Royal Academy * Resident assistant, a student leader

Government, military, and political organizations

* Rainbow Alliance (Liberia), a political alliance in Liberia * Regular Army, the permanent force of an army that is maintained during peacetime * Regulatory affairs, a department in charge of industry-government relations * Provisional Irish Republican Army, Irish Nationalist paramilitary group active during The Troubles * Resettlement Administration, a New Deal government program in the United States * Royal Artillery, a regiment of the British Army

Other businesses and organizations

* The Ramblers, Ramblers' Association, a UK organisation for walkers *Registration authority, a body which maintains lists of international standards codes * Rowing Australia, governing body for the sport of rowing in Australia * Road America, which uses the logo "RA"; a racetrack in Wisconsin, USA * Nepal Airlines (IATA code RA)

Linguistics

* Ra (Javanese) (ꦫ), a letter in the Javanese script * Ra (kana), the Japanese kana ら and ラ * ረ and ራ, Amharic letters that can be read as variations of ''ra'', also related to the Semitic resh * Resh or ''rāʾ'', 10th letter of Arabic alphabet * :wikt:Ռ, Ռ or ''ṙa'', the 28th letter in the Armenian alphabet * र, ड़', ढ़, and र्ह, Devanagari letters which can be called ''ra'', ''ṛa'' or ''rha'' * Rha (Cyrillic), Ԗ, the 23rd letter ''rha'' («ра») in the older (1924−1927) Moksha language Cyrillic script * ர and ற, Tamil language, Tamil letters articulated as ''ra'', ''tra'' or ''dra'' depending on the consonant complex

Places

* Argentina, license plate code * Ra (island) (or ''Rah''), a small island of Vanuatu * Ra Province in Fiji ** Ra (Fijian Communal Constituency, Fiji) ** Ra (Open Constituency, Fiji) * Armenia, Republic of Armenia * Rawlins County, Kansas, of which the largest city is Atwood

Religion and mythology

* Ra, the Sun-god of Ancient Egypt * Rå, a creature in Scandinavian mythology * Rā, a Māori language, Māori word for the Sun that is also used in other Polynesian languages. * Roua or Ra, a Polynesian deity * Tama-nui-te-rā, a Maori Sun-god * ''Radeyallāhu ′Anhu'', an Islamic honorifics, Islamic honorific.

Science and technology

Biology and medicine

* Retinoic acid, a metabolite of vitamin A * Retrograde amnesia, a form of amnesia * Rheumatoid arthritis, a chronic, systemic inflammatory disorder that attacks synovial joints *Refractory anemia, an expression of myelodysplasia

Computing

* .ra, the file extension for RealAudio files * Registration authority, in public key cryptography * RemoteAccess, a BBS software program * Route Advertisement, in networking, part of the Neighbor Discovery Protocol

Transportation

* SJ Ra, a Swedish locomotive * Radar altimeter, an instrument on aircraft * Resolution Advisory, an aircraft instruction from a Traffic Collision Avoidance System

Other uses in science and technology

R_a

or Ra, a popular parameter of Surface roughness, roughness, defined as the average of absolute values of deviation from the mean of a surface * Color rendering index (

R_a

), a measure of the ability of a light source to reveal the colors of objects faithfully * Radium, symbol Ra, a chemical element * Rain (METAR weather code RA) * Rayleigh number, in physics * Relation algebra, a type of mathematical structure * Right ascension, in astronomy * Risk analysis, in several fields * Resource adequacy, in electrical power grids

People with the surname

*Armen Ra, Iranian-born American musician *Aron Ra, American author, podcaster, and atheist activist *Ed Ra (born 1981), American politician

Other uses

* Thor Heyerdahl#Boats Ra and Ra II, Ra I and Ra II, reed boats used by Thor Heyerdahl's transatlantic expeditions * Architect, Registered Architect, as a post-nominal suffix * Relationship anarchy, the practice of building human relationships in non-hierarchical ways, based on individual agreements rather than cultural norms. * Remittance advice, a letter sent by a customer to a supplier, to inform the supplier that their invoice has been paid * Research assistant, in academia * Resident assistant, in college housing * Republic Act, Philippine laws from 1946 to 1972 and after 1987 * One of several ISO 217 standard paper sizes * "Ra", a disc golf midrange disc by Infinite Discs