| Abbreviation | Definition |
|---|---|
| BSI | British Standards Institute |
| BSL | BioSafety level |
| BST | Bovine SomatoTropin |
| BSTS | Bundled Supplement Tracking System |
| BT | Bacillus Thuringiensis |
| BT | bioterrorism |
| BT | Bio-Terrorism |
| BTA | BioTerroism Act of 2002 |
| BTAct | Bioterrorism Act (Public Health Security and Bioterrorism Preparedness and Response Act of 2002) |
| BTCB | Blood and Tissue Compliance Branch |
| BTCB(CBER) | Blood and Tissue Compliance Branch (CBER) |
| BTR | Blood and Tissue Registration System |
| BUF-DO | BUFfalo, New York, District Office |
| BUF-DO(ORA) | Buffalo (New York) District Office (ORA) |
| BUN | Blood Urea Nitrogen |
| BUS | BIMS (Biologic IND (Investigational New Drug) Management System) User Support Group |
| BVB | Bacterial Vaccine and Allergenic Products Branch |
| BVB(CBER) | Bacterial Vaccine and Allergenic Products Branch (CBER) |
| BVC | British Veterinary Codex |
| BW | Body Weight |