| Abbreviation | Definition |
|---|---|
| PALS | PeriArteriolar Lymphoid Sheath |
| PALS | Phonological Awareness Literacy Screening |
| PAM | perception-action mechanism |
| PAM | physical activity monitor |
| PAM | Pregnancy After Miscarriage |
| PAMS | Perceptual Analysis Measurement System |
| PAN | Physicians Association for Nutrition |
| PAN | PolyArteritis Nodosa |
| PANDA | Perinatal Anxiety and Depression Australia |
| PANDAS | Pediatric Autoimmune Neuropsychiatric Disorder |
| PANTHER-IPF | Prednisone, Azathioprine, and N-Acetylcysteine |
| PAO2 | Pressure of Oxygen |
| PAOD | Peripheral Arterial Occlusive Disease |
| PAP | PAPanicolaou |
| PAP | Patient Assistance Program |
| PAP | Prostate Acid Phosphatase |
| PAP | Pulmonary Arterial Pressure |
| PAP | Pyelonephritis Associated Pilus |
| PAR | Peak to Average Ratio |
| PAR | Pelvic Anterior Rotation |