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), 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 In music, solfège (British English or American English , ) or solfeggio (; ), also called sol-fa, solfa, solfeo, among many names, is a mnemonic used in teaching aural skills, Pitch (music), pitch and sight-reading of Western classical music, W ...

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 Rise Against is an American punk rock band from Chicago, formed in 1999. The group's current line-up comprises vocalist/rhythm guitarist Tim McIlrath, lead guitarist Zach Blair, bassist Joe Principe and drummer Brandon Barnes. Rise Against's mu ...

, an American punk/hardcore band

Albums

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

Songs

* "Ra", a song by Northlane from ''

Node In general, a node is a localized swelling (a "knot") or a point of intersection (a vertex). Node may refer to: In mathematics * Vertex (graph theory), a vertex in a mathematical graph *Vertex (geometry), a point where two or more curves, lines ...

'', 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 ''Resident Advisor'' (also known as ''RA'') is an online music magazine and community platform established in 2001 and dedicated to showcasing electronic music, artists and events across the globe. Its editorial team provides news, music and ev ...

'', 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 A regular army is the official army of a state or country (the official armed forces), contrasting with irregular forces, such as volunteer irregular militias, private armies, mercenaries, etc. A regular army usually has the following: * a ...

, 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 The Provisional Irish Republican Army (Provisional IRA), officially known as the Irish Republican Army (IRA; ) and informally known as the Provos, was an Irish republican paramilitary force that sought to end British rule in Northern Ireland ...

, Irish Nationalist paramilitary group active during The Troubles * Resettlement Administration, a New Deal government program in the United States *

Royal Artillery The Royal Regiment of Artillery, commonly referred to as the Royal Artillery (RA) and colloquially known as "The Gunners", is one of two regiments that make up the artillery arm of the British Army. The Royal Regiment of Artillery comprises t ...

, 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 Nepal Airlines Corporation (), formerly known as Royal Nepal Airlines (), is the flag carrier of Nepal. Founded in 1958, it is the oldest airline of the country. Out of its main base at Tribhuvan International Airport, Kathmandu, the airline ope ...

(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 Resh is the twentieth Letter (alphabet), letter of the Semitic abjads, including Phoenician alphabet, Phoenician ''rēš'' 𐤓, Hebrew alphabet, Hebrew ''rēš'' , Aramaic alphabet, Aramaic ''rēš'' 𐡓‎, Syriac alphabet, Syriac ''rēš'' � ...

or ''rāʾ'', 10th letter of Arabic alphabet * Ռ or ''ṙa'', the 28th letter in the

Armenian alphabet The Armenian alphabet (, or , ) or, more broadly, the Armenian script, is an alphabetic writing system developed for Armenian and occasionally used to write other languages. It is one of the three historical alphabets of the South Caucasu ...

* र, ड़', ढ़, and र्ह,

Devanagari Devanagari ( ; in script: , , ) is an Indic script used in the Indian subcontinent. It is a left-to-right abugida (a type of segmental Writing systems#Segmental systems: alphabets, writing system), based on the ancient ''Brāhmī script, Brā ...

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 Argentina, officially the Argentine Republic, is a country in the southern half of South America. It covers an area of , making it the List of South American countries by area, second-largest country in South America after Brazil, the fourt ...

, 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

Biology and medicine

* Retinoic acid, a metabolite of vitamin A * Retrograde amnesia, a form of amnesia *

Rheumatoid arthritis Rheumatoid arthritis (RA) is a long-term autoimmune disorder that primarily affects synovial joint, joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest. Most commonly, the wrist and h ...

, 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 Public-key cryptography, or asymmetric cryptography, is the field of cryptographic systems that use pairs of related keys. Each key pair consists of a public key and a corresponding private key. Key pairs are generated with cryptographic al ...

* 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 Rain is a form of precipitation where water drop (liquid), droplets that have condensation, condensed from Water vapor#In Earth's atmosphere, atmospheric water vapor fall under gravity. Rain is a major component of the water cycle and is res ...

(METAR weather code RA) * Rayleigh number, in physics * Relation algebra, a type of mathematical structure *

Right ascension Right ascension (abbreviated RA; symbol ) is the angular distance of a particular point measured eastward along the celestial equator from the Sun at the equinox (celestial coordinates), March equinox to the (hour circle of the) point in questio ...

, in astronomy *

Risk analysis In simple terms, risk is the possibility of something bad happening. Risk involves uncertainty about the effects/implications of an activity with respect to something that humans value (such as health, well-being, wealth, property or the environ ...

, 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 * 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 A research assistant (RA) is a researcher employed, often on a temporary contract, by a university, research institute, or privately held organization to provide assistance in academic or private research endeavors. Research assistants work under ...

, 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