| C3 | third cervical nerve; third cervical vertebra; third component of complement |
|---|---|
| ECG | Electro-Cardio-Graphy(-Gram); 심전도 = EKG 1. Conducting System Structu... |
| oesoph | esophagus [oesophagus] |
| M/3 | middle third |
| MEC | median effective concentration; middle ear canal; middle ear cell; minimum effective concentration |