| PLES | parallel-line equal space |
|---|---|
| PTA | parallel tubular arrays; parathyroid adenoma; percutaneous transluminal angioplasty; peroxidase-labe... |
| DIPI | defective interfering particle induction |
| FID | flame ionization detector; free induction decay; fungal immunodiffusion |
| FIS | forced inspiratory spirogram; free induction signal |