| PNH | paroxysmal nocturnal hemoglobinuria; polynuclear hydrocarbon |
|---|---|
| COLD | A cold agglutinin titer |
| COLD | Chronic Obstructive Lung Disease |
| COWS | Cold Opposite, Warm Same |
| ACU | acquired cold urticaria; acute care unit; agar colony-forming unit; ambulatory care unit |