Ra (disambiguation)

Ra is the Sun-god of Ancient Egypt.

Ra or RA may also refer to:

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

Arts and entertainment

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

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

• 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 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 honorific.

Science and technology

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

See also

• RAH (disambiguation)
• RHA (disambiguation)
• RAS (disambiguation)
• Ras (disambiguation)
• Re (disambiguation)

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