Look up NAO or nao in Wiktionary, the free dictionary.

NAO or nao may refer to:

• National Academy Orchestra of Canada, a Canadian training orchestra
• National Applications Office, a former program of the United States Department of Homeland Security
• National Audit Office (disambiguation), in several nations
• Nautical Almanac Office (disambiguation)
  • HM Nautical Almanac Office, in the United Kingdom
  • Nautical Almanac Office, at the United States Naval Observatory
• New Age Outlaws, a wrestling tag team

• Sodium oxide (NaO)
• Nonyl Acridine Orange, a fluorescent die. It can stain cardiolipin content of mitochondria.
• North Atlantic oscillation, a climatic phenomenon
• Nao (robot), a humanoid robot developed by Aldebaran Robotics
• 13221 Nao, an asteroid

• Nao (given name), a Japanese given name
• Nao (singer), a United Kingdom music artist

• Näo, a village in Estonia
• Nao, Iran, a village in Kurdistan Province
• Nenets Autonomous Okrug, a federal subdivision of Russia

• Carrack, a sailing ship known as a nao in Spanish
• Nanchong Gaoping Airport (IATA code), an airport in China
• Nao (musical instrument) (鐃), see List of Chinese musical instruments
• Nao, a fictional character in the Aquablue comic
• Nao Porcelain, a brand owned by Lladro

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