| Abbreviation | Definition |
|---|---|
| BJ | Bone And Joint |
| BJD | Biju Janta Dal |
| BJD | Biju Janata Dal |
| BJE | Bones, joints, extremities |
| BJM | Bones, joints, muscles |
| BJP | Bhartiya Janta Party |
| BJT | Bipolar Junction Transistors |
| BK | Bovine Kidney [cells] |
| BKA | Below Knee Amputation |
| BKD | Bacterial Kidney Disease |
| BKD | Backscatter Kikuchi Diffraction |
| BKKG | BookKeeping |
| BKL | Big Kernel Lock |
| BKNG | Banking |
| BKNG | Backing |
| BKPR | Bookeeper |
| BKU | Bhartiya Kisan Union |
| BL | British Literature |
| BL | Basic Logic |
| BL | Bilateral lower lung fields |
| BL | Bone Marrow Lymphocyte |
| BL | Burkitt Lymphoma |
| BL | Bottom Line |
| BLA | Bachelor of Landscape Architecture |
| BLAST | Building Local Agricultural Systems Today |
| BLC | Branch and Loop Continuous |
| BLCL | Burkitt Lymphoma Cell Line |
| BLD | Breakfast Lunch Dinner |
| BLDG | Building Levels for Descent Guild |
| BLE | Both lower extremities |
| BLEM | Beijing (Peking) Laboratory of Electron Microscopy |
| BLEVE | Boiling Liquid Expanding Vapor Explosion |
| BLEVE | Boiling Liquid Expansion Vapour Explosion |
| BLG | Binary line generalization |
| BLIHR | Business Leaders In Human Rights |
| BLIS | Bacteriocin Like Inhibitory Substances |
| BLIS | Business License Information System |
| BLIS | Brownfields Location Information System |
| BLLB | Bone Ligament Labrum Bone |
| BLLV | Bloodland Lake Virus |
| BLM | Branch Lending Manager |
| BLM | Bureau of Land Management |
| BLOB | Binary Large Object |
| BLOW | Booster-Lift-Off Weight |
| BLPU | Basic land and property unit |
| BLR | Base Lending Rate |
| BLS | Black Liquor Solids |
| BLS | Basic Life Support (a basic level of prehospital training) |
| BLS | Bureau of Labor Statistics |
| BLS | Blood And Lymphatic System |