Na

Na or na may refer to:

• Na (kana), a Japanese kana
• Na (tree) or Mesua ferrea, a species of tree native to Sri Lanka
• .na, the top-level domain for Namibia
• Na people, a small tribal group in India
• Mosuo or Na, a small ethnic group in China near Tibet
• Nauruan language ISO code
• Sodium's chemical symbol

NA or N.A. may refer to:

• North America, a continent
• Avogadro constant or N_A
• Namibia's ISO country code
• NA, Naples' Italian car number plates provincial designator
• Narcotics Anonymous, a twelve-step program that focuses on addiction
• National Academician, a member of the National Academy of Design
• National Alliance (Netherlands), a former Dutch political party
• National Association (N.A.), a United States term indicating a national bank
• National Association of Professional Base Ball Players, the first professional baseball league
• NA, Netherlands Antilles' former international vehicle registration code
• Neuroacanthocytosis
• Neurotics Anonymous, the predecessor to Emotions Anonymous
• Noradrenaline or Norepinephrine, a hormone
• North American Airlines's IATA code
• Nucleic acid analogues, given various abbreviations terminating in NA
• Numerical aperture, a dimensionless number that characterizes a range of angles

See also

• n/a, abbreviation for not applicable
• Virgin New Adventures or NAs, a series of Doctor Who novels
• Na Na (disambiguation)
• Na Na Na (disambiguation)