PNA

PNA or Pna has a variety of meanings:

Science and Engineering

• abbreviation for orchid genus Paphinia
• 4-Nitroaniline - chromogenic substrate, also known as para-Nitroaniline
• 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 for plastic material.
• Polynuclear Aromatic Hydrocarbons, more commonly: Polycyclic aromatic hydrocarbons (PAHs)
• Programmable Network analyzer (electrical)
• Protected Natural Area (disambiguation)
• 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
• Project for Nuclear Awareness, a non-profit organization that advocates for the abolition of nuclear weapons by educating the public and policy makers
• Partido Nueva Alianza, the Spanish name for the New Alliance Party (Mexico)
• Parties to the Nauru Agreement
• Pennsylvania Newspaper Association
• Philippine Nurses Association
• Polish National Alliance
• Prefectura Naval Argentina, the Spanish name for the Argentine Naval Prefecture

Computing

• HomePNA, a home computer networking standard
• Personal Navigation Assistant (PNA)

Health

• Ingrown nail#Nail avulsion (Partial Nail Avulsion), a treatment of ingrown toenails.
• Pneumonia, an infection of the lungs.

Psychiatric Nursing Assistant

Other

• Pacific Northern Airlines
• Pacific-North American teleconnection pattern
• Pamplona Airport
• Philippines News Agency
• Pre-Nuptial Agreement, a marriage contract

Look up PNA in Wiktionary, the free dictionary.