| SU | salicyluric acid; secretory unit; sensation unit; solar urticaria; sorbent unit; spectrophotometric ... |
|---|---|
| PIXE | particle-induced x-ray emission; proton-induced x-ray emission |
| Parkinson's Disease Foundation; peritoneal dialysis fluid; Portable Document Format; pyruvate dehydr... | |
| PIDRA | portable insulin dosageregulating apparatus |
| PIIP | portable insulin infusion pump |