Ra (disambiguation)

Ra is the Sun-god of Ancient Egypt.

Ra or RA may also refer to:

Film and television

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

Gaming

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

Songs

 * "Ra", a song by Northlane from 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

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

 * 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
 * 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
 * Ԗ, the 23rd letter rha («ра») in the older (1924−1927) Moksha language Cyrillic script
 * ர and ற, 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)
 * 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 word for the Sun
 * Roua or Ra, a Polynesian deity
 * Tama-nui-te-rā, a Maori Sun-god
 * Radeyallāhu ′Anhu, an Islamic honorific.

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 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

 * Ra I and Ra II, reed boats used by Thor Heyerdahl's transatlantic expeditions
 * Registered Architect, as a post-nominal suffix
 * 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