| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
|---|---|
| ORS | olfactory reference syndrome; oral rehydration solution; oral surgery, oral surgeon; Orthopaedic Res... |
| Gr1P0AB1 | one pregnancy, no births, one abortion |
| OCP | octacalcium phosphate; ocular cicatricial pemphigoid; oral case presentation; oral contraceptive pil... |
| OET | oral endotracheal tube; oral esophageal tube |