PA
PA commonly refers to the U.S. state of Pennsylvania, the country of Panama, the personality trait of passive‑aggressiveness, the Privacy Act legislation, or the Pop Art movement.
Medical
Pulmonary Artery
Pernicious Anemia
Passive Aggressive
Psoriatic Arthritis
Provider Assigned
Personal Accident
Postero-Anterior
Palaeopathology Association
paranoia
Parapsychological Association
Percussion & Auscultation
Performance Analysis
periarteritis
Periodic Acid
Pernicious Anaemia
photoallergic
Physician Advisor
physician’s assistant (USA)
Plasminogen Activator
Platelet Adhesiveness
Police Authority (!)
polyarteritis
Positive Attitude
postmortem examination–i.e., an autopsy; PM is more common
prealbumin
Pregnancy-Associated
ProcainAmide
Programmed Activity
Prophylactic Antibiotic
Prostitutes Anonymous
Protrusio Acetabuli
pseudoaneurysm
Psoriasis Association
psychoanalyst
Psychological Age
Pulmonary Angiography
Pulmonary Atresia
pulpoaxial
Positive Affect
Physician Assistant
Miscellaneous
PolyAmide (Nylon)
Preppie Anarchist
Prosser Ambassador
Post Auctor
Paranoids Anonymous
Position Angle
Performance Assertion
Partially Apply
Pre Alpine
Panties Anonymous
Potentially Annoying
Physical Affair
Project Airbus
Pumpkin Ath
Peep Abuse
Prismatic And
Path Aux
Piper Aircraft
Para Again
Personal Appearence
Pseudomonas Aeruginosa
Pokey Award
Pathetic Australian
Provider Aggregatable
Palestinian Assassins
Penelope Anyway
Parameters Avf
Project A
Presenetljiva Agencija
Papa A
Procurement Administrator
Payment Authorization
Pro Audio
Port Angeles
Passenger Address
Pennsylvania also
Propionic Acidemia
Community
Performance Assessment
Phonemic Awareness
Performance Audio
Parental Advisory
Push America
Performing Artist
Peace Action
Police Advisor
Pop Art
Pretty Average
Prince Albert
Park Avenue
Press Association
Perfect Attendance
Procrastinators Anonymous
Program Announcement