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




  • 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[edit]

  • Na or 羅, a Korean surname related to the Chinese surname Luo
  • Na, a particle used in Thai noble names

Arts, entertainment, and media[edit]



  • Mosuo or Na, a small ethnic group in China near Tibet
  • Na people, a small tribal group in India



Science and technology[edit]

Biology and medicine[edit]

  • Na (tree) or Mesua ferrea, a species of tree native to Sri Lanka
  • Neuroacanthocytosis, neurological conditions in which the blood contains misshapen, spiculated red blood cells called acanthocytes
  • Nomina Anatomica, a former international standard for human anatomical nomenclature
  • Noradrenaline or norepinephrine, a hormone
  • Nucleic acid analogue, compounds analogous to naturally occurring RNA and DNA, used in medicine and in molecular biology


Other uses in science and technology[edit]

Other uses[edit]

See also[edit]