| Abbreviation | Definition |
|---|---|
| BRAC | Basic Rest Activity Cycle |
| BRB | Bright Red Blood |
| BRBPR | Bright Red Blood Per Rectum |
| BRBR | BRonchial BReathing |
| BRBRP | Bright Red Blood Per Rectum |
| BRDV | Broadhaven Virus |
| BRI | Building Related Illness |
| BRIC | Benign Recurrent Intrahepatic Cholestasis |
| BROMPHEN | Brompheniramine Maleate |
| BRT | Block Replacement Therapy |
| BRVO | Branch Retinal Vein Occlusion |
| BRW | Benchmark Risk Weight |
| BRX | Body Response to X |
| BS | Blood Sugar |
| BS | Body Smell |
| BS | Bone Stock |
| BS | Bowel Sounds |
| BS | Brain Size |
| BS | Brain State |
| BS | Breath Sounds |