| PPD | packs per day; paraphenylenediamine; percussion and postural drainage; permanent partial disability;... |
|---|---|
| SI | International System of Units [Fr. le Systeme International d'Unites]; sacroiliac; saline infusion; ... |
| PPDs | (Tuberculin) Purified Protein Derivatives |
| HP | halogen phosphorus; handicapped person; haptoglobin; hard palate; Harvard pump; health profession(al... |
| PAP | pancreatitis-associated protein; Papanicolaou [test]; papaverine; passive-aggressive personality; pa... |