| Abbreviation | Definition |
|---|---|
| BSU | Blood Stool And Urine |
| BTA | Biological Terrain Assessment |
| BTA | Bladder Tumor Antigen |
| BTC | Biologically Targeted Coherent |
| BTC | Blood Transfusion Centre |
| BTC | Borgwaldt Test Centre |
| BTCT | Bleeding Time and Clotting Time |
| BTEX | Benzene, Toluene, Ethylbenzene, and Xylene |
| BTL | BACnet Testing Laboratories |
| BTL | BACnet Testing Laboratory |
| BUBL | Bathysphere Underwater Biological Laboratory |
| BUCL | Biomedical Ultrasonics and Cavitation Laboratory |
| BUCL | Birmingham Urban Climate Laboratory |
| BUD | Black Urine Disease |
| BUGS | Bacteria Under Guidance And Supervision |
| BUL | Bell University Laboratories |
| BUL | Biomedical Ultrasonics Laboratory, University of Michigan |
| BUN | Blood Urea Nitrogen |
| BUS | Bartholin, Urethral, and Skene |
| BW | Brood War |