PNA or Pna has a variety of meanings:
Science and engineering abbreviation for orchid genus Paphinia Pacific–North American teleconnection pattern, a climatic phenomenon Parisiensia Nomina Anatomica, the revision of anatomic nomenclature Peanut agglutinin, a lectin specific for Gal-β(1–3)-GalNAc Peptide nucleic acid, an artificially synthesized polymer similar to DNA or RNA. Plastic neutral axis, an engineering value used in plastic section modulus Pottery Neolithic A, a division of the Pottery Neolithic period in archaeology
Organizations Pakistan National Alliance Palestinian National Authority, an administrative autonomous government in parts of the West Bank and the Gaza Strip Partido Nacional Agrarista (National Agrarian Party), a Mexican left-wing agrarian political party founded in 1920 Partidul Național-Agrar (National Agrarian Party), a Romanian right-wing agrarian political party active in the 1930s People's National Army Project for Nuclear Awareness, a non-profit organization that advocates for the abolition of nuclear weapons, co-founded by John C. Haas Polish National Alliance, a non-profit organization, the largest Polish – American Fraternal Benefit Society in USA offering life insurance and annuities. Founded in 1880, operates solely for the benefit of its members. Pa-O National Army Partido Nueva Alianza, the Spanish name for the New Alliance Party (Mexico) Parties to the Nauru Agreement Pennsylvania NewsMedia Association Philippine Nurses Association Prefectura Naval Argentina, the Spanish name for the Argentine Naval Prefecture National Anticorruption Directorate, Romania; formerly, National Anticorruption Prosecution Office (PNA)
Computing HomePNA, a home-computer networking standard Personal navigation assistant (PNA)
Other Pacific Northern Airlines, acquired by Western Airlines in 1967 Pamplona Airport Partial nail avulsion, a treatment of ingrown toenails Philippine News Agency Prenuptial agreement, a marriage contract
See also PNAS, Proceedings of the National Academy of Sciences of the United States of America PnaS, Phosphate-Sodium Symporter, a sodium/phosphate cotransporter Protected Natural Area (disambiguation)