1. Arts and entertainment
    Film and television  Gaming  Music  Performers  Albums  Songs  Other media 

2. Businesses and organizations
    Academia  Government, military, and political organizations  Other businesses and organizations 

3. Linguistics

4. Places

5. Religion and mythology

6. Science and technology
    Biology and medicine  Computing  Transportation  Other uses in science and technology 

7. People with the surname

8. Other uses

9. See also

Ra is the Sun-god of Ancient Egypt.

Ra or RA may also refer to:

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
• Red Alert, a game

Music

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

Performers

• Ra (American band), an American rock band
• Ra (artist), 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 (Inna song), 2018

Other media

• Ra (artist), the pseudonym of Raoul Sinier, a French digital painter and electronic musician
• 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

• 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
• Resettlement Administration, a New Deal government program in the United States
• Royal Artillery, a regiment of the British Army

Other businesses and organizations

• Registration authority, a body which maintains lists of international standards codes
• Rowing Australia, governing body for the sport of rowing in Australia
• 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

• 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

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

• , a popular parameter of roughness, defined as the average of absolute values of deviation from the mean of a surface
• Color rendering index (), a measure of the ability of a light source to reveal the colors of objects faithfully
• Radium, a chemical element with symbol Ra
• 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

People with the surname

• Armen Ra, Iranian-born American musician
• 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
• Resident assistant, in college housing
• Republic Act, Philippine laws from 1946 to 1972 and after 1987
• One of several ISO 217 standard paper sizes

See also

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

• Zygomycete
• Zygomycetes
• Zygomycosis
• Zygomycota
• Zygon
• Zygon (journal)
• Zygons
• Zygopetalum
• Zygophyllaceae
• Zygophyllales
• Zygophyllidium
• Zygoptera
• Zygospermum
• Zygospore
• Zygote
• Zygote intra-fallopian transfer
• Zygote intrafallopian transfer
• Zygote Media Group
• Zygotes
• Zygovisti
• Zyhimont
• Zyklon
• Zyklon B
• Zyklon b
• Zyklon-B