| Acronym | Definition |
|---|
| ECRB | Extensor Carpi Radialis Brevis |
| ECRB | Entreprise de Construction et Rénovation de Bâtiment (French construction and renovation company) |
| ECRB | École Communautaire Réal-Bérard (French: Réal-Bérard Community School; Canada) |
| ECRB | East Coast Reptile Breeders |
| ECRB | East Continent Rift Basin (various states) |
| ECRB | Energy Community Regulatory Board (advisory body of the Energy Community |
| ECRB | External Civil Rights Branch |
| ECRB | Enhanced Characterization of Repository Block |
| ECRB | External Connection Review Board |