| Acronym | Definition |
|---|
| EMSA | Electrophoretic Mobility Shift Assay (molecular biology) |
| EMSA | European Maritime Safety Agency |
| EMSA | Emergency Medical Services Authority (California) |
| EMSA | European Medical Students' Association |
| EMSA | Emergency Medical Services Agency |
| EMSA | Electrophoretic Gel Mobility Shift Assay |
| EMSA | Emergency Medical Services Appropriation |
| EMSA | External Measure of Student Achievement |
| EMSA | Electro Mobility Shift Assay (molecular biology) |
| EMSA | European Marine STEP (Standard for the Exchange of Product Model Data) Association |
| EMSA | Egyptian Medical Students Association |
| EMSA | Envelope Manufacturers and Suppliers Association (Alexandria, VA) |
| EMSA | Electron Microscope Society of America |
| EMSA | Emergency Medicine Student Association |
| EMSA | Eagle Mountain Soccer Association |
| EMSA | Employment Movement of South Africa |
| EMSA | European Mormon Studies Association |
| EMSA | Emergency Medical Services Alliance, Inc. |
| EMSA | Seaman Apprentice, Electrician's Mate Striker (Naval Rating) |