NA, N.A., Na, nA or n/a may refer to:
Chemistry and physics
- Sodium, symbol Na, a chemical element
- Avogadro constant (NA)
- Nucleophilic addition, a type of reaction in organic chemistry
- Numerical aperture, a number that characterizes a range of angles in an optical system
- nA, the symbol for nanoampere
- Naturally aspirated engine
Biology and medicine
- Na (tree) or Mesua ferrea, a species of tree native to Sri Lanka
- Neuroacanthocytosis, a neurological condition
- Nomina Anatomica, a former international standard for human anatomical nomenclature
- Noradrenaline, a hormone
- Nucleic acid analogue, compounds analogous to naturally occurring RNA and DNA
Places
Current
- Namibia (ISO country code)
- Naples (car number plate code: NA), Italy
- North America, a continent
- North Africa, a subcontinent
Historical
- Netherlands Antilles (former international vehicle registration code: NA)
- Na (Chinese state), a small state of the Chinese Zhou dynasty from the 11th to 8th centuries BC
- Nakoku, or Na, a state in Kyūshū, Japan from the 1st to early 3rd centuries AD
Names and titles
- Na (羅), a Korean surname related to the Chinese surname Luo
- Na, a particle used in Thai noble names
- National Academician, a member of the National Academy of Design
Art and entertainment
- Na (drum), a drum played by Tibetan shamans
- Nahal, Shine's pet Bengal tiger on the Nick Jr. TV show Shimmer and Shine
- New adult fiction, fiction marketed to people 18–30 years old
- Virgin New Adventures, a series of Doctor Who novels
- Na (EP) by Nayeon, 2024
Transport
- NA, the tailcode of VFA-94
- Nepal Airlines, the national flag carrier airline of Nepal
- North American Airlines (IATA code: NA)
- Naturally aspirated engine
- NA MX-5 Miata, the first generation of the Mazda Miata
Language
- Na (cuneiform), a cuneiform sign
- Na (Javanese) (ꦤ), a letter in the Javanese script
- Na (kana), a Japanese kana
- Na dialect, a Sino-Tibetan variety of India
- Na language (Narua), a Sino-Tibetan language of Yunnan, China
- Nauruan language (ISO code: na)
Organizations
- Narcotics Anonymous (NA), a twelve-step program that focuses on recovery from drug addiction
- National Alliance (Latvia), a Latvian political party
- National Alliance (Netherlands), a former Dutch political party
- National Association (disambiguation)
- National Association of Professional Base Ball Players, the first professional baseball league
- Nepali Army, the land military force of Nepal
- Neurotics Anonymous (N/A), a program for recovery from mental and emotional illness
Other uses
- .na, the top-level domain for Namibia
- N/A, meaning not applicable, not available, or no answer
- N.A., the official designation of federally chartered banks in the United States
- Mosuo or Na, an ethnic group in China near Tibet
- Na people, an ethnic group in India
- National Archives, the archives of a country
See also
Topics referred to by the same term
This disambiguation page lists articles associated with the title Na.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: