| PPD | packs per day; paraphenylenediamine; percussion and postural drainage; permanent partial disability;... |
|---|---|
| PPMA | progressive postmyelitis muscular atrophy |
| PPV | pneumococcal polysaccharide vaccine; porcine parvovirus; positive predictive value; positive pressur... |
| PRE | photoreacting enzyme; physician's report of examination; pigmented retinal epithelium; preplacement ... |
| PRF | partial reinforcement; patient report form; perforin; plasma recognition factor; pontine reticular f... |