| EC | effective concentration; ejection click; electrochemical; electron capture; embryonal carcinoma; eme... |
|---|---|
| EO | eosinophil; ethylene oxide; eyes open |
| HEENT | head, ears, eyes, nose, and throat |
| O2 | both eyes; diatomic oxygen; molecular oxygen |
| ou | both eyes together [Lat. oculi unitas] |