| Abbreviation | Definition |
|---|---|
| BLIS | Bilkent Laboratory and International School |
| BLISS | Behavioral Laboratory in the Social Sciences |
| BLL | Bilingual Language Laboratory |
| BLL | Blood Lead Level |
| BLOS | Bell Laboratories Operating System |
| BLT | Bright Light Treatment |
| BLTS | Bioptron Light Therapy System |
| BLWS | Bookman Laboratory Web Server |
| BM | Basal Medium |
| BM | Beneficial Microorganisms |
| BM | Biological Molecular |
| BM | Bump Mapping |
| BMA | Biological Movement Artifact |
| BMFT | Barium Meal Followthrough |
| BML | Biomanufacturing and Microfabrication Laboratory |
| BML | Biophotonics Microsystems Laboratory |
| BML | Bodega Marine Laboratory |
| BMLS | Bachelor of Medical Laboratory Science |
| BMLS | in Medical Laboratory Science |
| BMLT | Bachelor of Medical Laboratory Technology |