| Abbreviation | Definition |
|---|---|
| BCA | Breed Class Average |
| BCG | British Chelonia Group |
| BCI | Bat Conservation International |
| BCII | Bovine Collagen type II |
| BCIZ | Butterfly Conservatory Insect Zoo |
| BCMS | British Cattle Movement Service |
| BCVA | British Cattle Veterinary Association |
| BCVMA | British Columbia Veterinary Medical Association |
| BD | Beagle Dog |
| BDBC | British Dog Breeders' Council |
| BDGA | British Dog Groomers' Association |
| BDOA | British Domestic Ostrich Association |
| BDP | Breed Definition Proposal |
| BDS | British Driving Society (carriage horses) |
| BDSL | Biological Diagnostic Supplies Limited |
| BDS-W | British Driving Society - Wales (carriage horses) |
| BE | Bear Extinction |
| BE | Bur Extractor |
| BEARS | Bear Education And Rehabilitation Sanctuary |
| BEF | British Equestrian Federation |