| PIIS | posterior inferior iliac spine |
|---|---|
| PION | posterior ischemic optic neuropathy |
| PIP | paralytic infantile paralysis; peak inflation pressure, peak inspiratory pressure; periodic interim ... |
| PLD | peripheral light detection; phospholipase D; platelet defect; polycystic liver disease; posterior la... |
| PLF | perilymphatic fistula; posterior lung fiber |