| PCFIA | particle concentration of fluorescence immunoassay |
|---|---|
| PIXE | particle-induced x-ray emission; proton-induced x-ray emission |
| PSD | particle size distribution; peptone, starch, and dextrose; periodic synchronous discharge; phase-sen... |
| PTT | partial thromboplastin time; particle transport time; posterior tibial tendon (transfer); prothrombi... |
| RLP | radiation leukemia protection; ribosome-like particle |