NA, N.A., Na, nA or n/a may refer to:

Chemistry and physics

Sodium Sodium is a chemical element with the symbol Na (from Latin ''natrium'') and atomic number 11. It is a soft, silvery-white, highly reactive metal. Sodium is an alkali metal, being in group 1 of the periodic table. Its only stable ...

, symbol Na, a chemical element * Avogadro constant (''N''_A) *

Nucleophilic addition In organic chemistry, a nucleophilic addition reaction is an addition reaction where a chemical compound with an electrophilic double or triple bond reacts with a nucleophile, such that the double or triple bond is broken. Nucleophilic additions ...

, 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 Naturally may refer to: ;Albums * '' Naturally!'', an album by Nat Adderley * ''Naturally'' (Houston Person album) * ''Naturally'' (J. J. Cale album) * ''Naturally'' (John Pizzarelli album) * ''Naturally'' (Sharon Jones album) * ''Naturally'' ...

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 Nucleic acid analogues are compounds which are Analog (chemistry), analogous (structurally similar) to naturally occurring RNA and DNA, used in medicine and in molecular biology research. Nucleic acids are chains of nucleotides, which are compos ...

, compounds analogous to naturally occurring RNA and DNA

Places

Current

Namibia Namibia (, ), officially the Republic of Namibia, is a country in Southern Africa. Its western border is the Atlantic Ocean. It shares land borders with Zambia and Angola to the north, Botswana to the east and South Africa to the south and e ...

(ISO country code) *

Naples Naples (; it, Napoli ; nap, Napule ), from grc, Νεάπολις, Neápolis, lit=new city. is the regional capital of Campania and the third-largest city of Italy, after Rome and Milan, with a population of 909,048 within the city's adminis ...

(car number plate code: NA), Italy * North America, a continent *

North Africa North Africa, or Northern Africa is a region encompassing the northern portion of the African continent. There is no singularly accepted scope for the region, and it is sometimes defined as stretching from the Atlantic shores of Mauritania in t ...

, a subcontinent

Historical

* Netherlands Antilles (former international vehicle registration code: NA) *

Na (Chinese state) The State of Na (, also written as 冉) was a minor state in Ancient China. History During the Zhou Dynasty in the 11th century BCE, the Duke of Zhou received orders from King Cheng of Zhou to announce an edict concerning descendants of the roya ...

, 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 ''Shimmer and Shine'' is an American animated television series created by Farnaz Esnaashari-Charmatz and produced by Nickelodeon Animation Studio. It premiered on Nickelodeon's Nick Jr. block on August 24, 2015, and ran for four seasons. The s ...

'' * New adult fiction, fiction marketed to people 18–30 years old * ''

Virgin New Adventures The ''Virgin New Adventures'' (NA series, or NAs) are a series of novels from Virgin Publishing based on the British Science fiction on television, science-fiction television series ''Doctor Who''. They continued the story of the Doctor from th ...

'', a series of ''Doctor Who'' novels

Transport

* NA, the tailcode of VFA-94 * Nepal Airlines, the national flag carrier airline of Nepal * North American Airlines (IATA code: NA) *

* 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) Na (hiragana: な, katakana: ナ) is one of the Japanese kana, which each represent one mora. The hiragana な is made in four strokes, the katakana ナ two. Both represent . な and ナ originate from the man'yōgana 奈. な is used as part of t ...

, a Japanese kana * Na dialect, a Sino-Tibetan variety of India * Na language (Narua), a Sino-Tibetan language of Yunnan, China *

Nauruan language The Nauruan or Nauru language () is an Austronesian language, spoken natively in the island country of Nauru. Its relationship to the other Micronesian languages is not well understood. Phonology Consonants Nauruan has 16–17 consonant ph ...

(ISO code: na)

Organizations

Narcotics Anonymous Narcotics Anonymous (NA), founded in 1953, describes itself as a "nonprofit fellowship or society of men and women for whom drugs had become a major problem." Narcotics Anonymous uses a 12-step model developed for people with varied subst ...

(NA), a twelve-step program that focuses on recovery from drug addiction * National Alliance (Latvia), a Latvian political party *

National Alliance (Netherlands) The National Alliance ( nl, Nationale Alliantie, abbr. NA or N.A.) was a Dutch ultranationalism, ultranationalist political party. It was disbanded in 2007. The party was formed on 12 November 2003, by Jan Teijn and Virginia Kapić. Teijn kicked ...

, a former Dutch political party *

National Association (disambiguation) National Association may refer to: Politics * National Association (South Korea), a political party 1946–1960 * Kokumin Kyōkai or National Association, a Japanese political party 1892–1899 Sports ''Unless noted otherwise, each of the below is ...

National Association of Professional Base Ball Players The National Association of Professional Base Ball Players (NAPBBP), often known simply as the National Association (NA), was the first fully- professional sports league in baseball. The NA was founded in 1871 and continued through the 1875 se ...

, the first professional baseball league *

Nepali Army The Nepali Army ( ne, नेपाली सेना, translit=Nēpālī Sēnā), technically the Gorkhali Army ( ne, गोरखाली सेना, translit=Gōrakhālī Sēnā, label=none; see ''Gorkhas''), is the land service branch ...

, the land military force of Nepal *

Neurotics Anonymous Neurotics Anonymous (N/A), founded in 1964, is a twelve-step program for recovery from mental and emotional illness. To avoid confusion with Narcotics Anonymous (NA), Neurotics Anonymous is abbreviated N/A or NAIL. History The conception of N ...

(N/A), a program for recovery from mental and emotional illness

Other uses

.na .na is the Internet country code top-level domain (ccTLD) for Namibia corresponding to the two letter code from the ISO-3166 standard. The registry accredits both Namibian and foreign registrars. Registrars access the Registry and register domai ...

, 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 The Mosuo (; also spelled Moso, Mosso or Musuo), often called the Naxi among themselves, are a small ethnic group living in China's Yunnan and Sichuan provinces, close to the border with Tibet Autonomous Region, Tibet. Consisting of a population ...

or Na, an ethnic group in China near Tibet * Na people, an ethnic group in India