| Acronym | Definition |
|---|
| ETRA | Endothelin Receptor Antagonists |
| ETRA | European Tyre Recycling Association |
| ETRA | Environment, Transport and Regional Affairs (UK parliament) |
| ETRA | Eye Tracking Research and Applications (symposium) |
| ETRA | East Timor Relief Association |
| ETRA | European Twowheel Retailers' Association |
| ETRA | Energetski Transformatorji |
| ETRA | electron transport regulator A |
| ETRA | Eastern Tropical Atlantic |
| ETRA | Emerald Trail Riders Association, Inc. (Eugene, OR) |
| ETRA | Errington Therapeutic Riding Association |
| ETRA | Emergency Tenant Remedy Action |
| ETRA | Electronic Test Requirements Analysis |
| ETRA | Electronic Transaction Risk Assessment (Digital Signature Trust) |
| ETRA | Electronic Remittance Translator (Systems Designs, Inc.) |
| ETRA | Education Training and Research Associates |
| ETRA | Estimated Time to Reach Altitude |
| ETRA | Ecosystem Trends and Risk Assessment |
| ETRA | East Texas Regional Airport |
| ETRA | East Tennessee Resource Agency |
| ETRA | East Tennessee Racing Association |
| ETRA | Emergency Tenant Remedies Act |