Look up Rao in Wiktionary, the free dictionary.

Rao or RAO may refer to:

Geography

• Rao, West Sumatra, one of the districts of West Sumatra, Indonesia
• Råö, a locality in Kungsbacka Municipality, Halland County, Sweden

Transport

• Dr. Leite Lopes–Ribeirão Preto State Airport , IATA code RAO, serving Ribeirão Preto, Brazil

Fictional entities

• Rao (comics), a fictional star in the DC Universe; Superman's planet Krypton revolved around it
• Rao (Greyhawk), god of peace, reason, and serenity in Dungeons & Dragons: World of Greyhawk
• Raō, the Japanese name for Raoh, a character in Fist of the North Star

Mathematics

• Cramér–Rao bound, a statistical concept
• Rao–Blackwell theorem, a theorem in statistics

Science

• Rao (insect), a genus of wasps in the subfamily Platygastrinae
• Recent African origin of modern humans (RAO), a paleoanthropological theory
• Recurrent airway obstruction (RAO), a respiratory disease in horses
• Response amplitude operator (RAO), a function relating a response to an input given the input frequency

Titles

• Rao (title), cognate Hindi variations of the (originally Hindu) title Raja(h)
• Rao Bahadur, a title of honour issued by the British in India

Other uses

• Rai (disambiguation)
• Ray (disambiguation)
• Rau (disambiguation)
• Rao (Indian surname)
• Rao (Chinese surname)
• Rao language
• Rao's, an Italian restaurant in New York City, USA named after its founder, Joshua Anthony Rao