Na
NA, N.A., Na, or n/a may refer to:
Places
Na (state) or 那, a small state of Zhou Dynasty
Namibia's ISO country code
- .na, the top-level domain for Namibia
.na, the top-level domain for Namibia
North America, a continent
Science and medicine
Sodium's chemical symbol
Avogadro constant, NA
Neuroacanthocytosis
Nomina Anatomica, a former international standard for human anatomical nomenclature
Noradrenaline or norepinephrine, a hormone
Nucleic acid analogues
Numerical aperture, a number that characterizes a range of angles in an optical system
Linguistics
Nauruan language's ISO code
Na (kana), a Japanese kana
Na (Javanese) (ꦤ), a letter in the Javanese script
Peoples
Na people, a small tribal group in India
Mosuo or Na, a small ethnic group in China near Tibet
Na or 羅, a Korean surname related to the Chinese surname Luo
Other uses
n/a, not applicable
Na (drum), a drum played by Tibetan shamans
Na (tree) or Mesua ferrea, a species of tree native to Sri Lanka
Narcotics Anonymous, a twelve-step program that focuses on addiction