| OET | oral endotracheal tube; oral esophageal tube |
|---|---|
| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
| COD | 1) Choice Of Drug 2) Cause Of Death 3) Chemical O2 Demand;... |
| TOC | Treatment Of Choice |
| AAOC | antacid of choice |