| Abbreviation | Definition |
|---|---|
| EMV | eye-motor-verbal (Glasgow coma scale) |
| ENG(OC) | Engineering Team (OC) |
| ENL | Erythema Nodosum Leprosum |
| ENT | ear, nose and throat |
| ENTB(CDRH) | Ear, Nose, and Throat Devices Branch (CDRH) |
| EO | Executive Order |
| EOC | Emergency Operations Center (FDA) |
| EOD | Enter On Duty |
| EOD | Experimental Operational Directive |
| eOFP | electronic Official Personnel File |
| EOM | Extra-Ocular Muscles |
| EOP1 | End-Of-Phase 1 |
| EOP2 | End-Of-Phase 2 |
| EORTC | European Organisation for Research and Treatment of Cancer |
| EOS | End Of Study |
| EOS(CDER) | Executive Operations Staff (CDER) |
| EOS(ORA) | Executive Operations Staff (ORA) |
| EP | European Pharmacopoeia |
| EPAR | European Public Assessment Report |
| EPC | Evidence-based Practice Center |