| PPD | packs per day; paraphenylenediamine; percussion and postural drainage; permanent partial disability;... |
|---|---|
| COLD | Chronic Obstructive Lung Disease |
| COWS | Cold Opposite, Warm Same |
| PCH | Paroxysmal Cold Hemoglobinuria |
| ACU | acquired cold urticaria; acute care unit; agar colony-forming unit; ambulatory care unit |