| Abbreviation | Definition |
|---|---|
| PA | physician’s assistant (USA) |
| PA | physicians assistant (USA) |
| PA | plasminogen activator |
| PA | platelet adhesiveness |
| PA | Police Authority (!) |
| PA | polyarteritis |
| PA | positive attitude |
| PA | postmortem examinationi.e., an autopsy; PM is more common |
| PA | postmortem examination–i.e., an autopsy; PM is more common |
| PA | prealbumin |
| PA | pregnancy-associated |
| PA | Prostitutes Anonymous |
| PA | protrusio acetabuli |
| PA | pseudoaneurysm |
| PA | Psoriasis Association |
| PA | psychoanalyst |
| PA | psychological age |
| PA | pulmonary angiography |
| PA | pulmonary atresia |
| PA | pulpoaxial |