| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |
|---|---|
| OET | oral endotracheal tube; oral esophageal tube |
| OHI | Occupational Health Institute; operative hypertension indicator; oral hygiene index; Oral Hygiene In... |
| DIT | Diet Induced Thermogenesis = Thermic Effect of Food = Specific Dynami... |
| FDA | Food & Drug Administration |