| OET | oral endotracheal tube; oral esophageal tube |
|---|---|
| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
| COLD | Chronic Obstructive Lung Disease |
| COWS | Cold Opposite, Warm Same |
| PCH | Paroxysmal Cold Hemoglobinuria |