| PID | pain intensity difference [score]; pelvic inflammatory disease; photoionization detector; picture im... |
|---|---|
| PSD | particle size distribution; peptone, starch, and dextrose; periodic synchronous discharge; phase-sen... |
| TCD | tapetochoroidal dystrophy; T-cell depletion; thermal conductivity detector; tissue culture dose; tra... |
| UFD | ultrasonic flow detector; unilateral facet dislocation |
| API | alkaline protease inhibitor; Analytical Profile Index; arterial pressure index; atmospheric pressure... |