| Abbreviation | Definition |
|---|---|
| BOSS | Burn Out Stress Syndrome |
| BRRS | Bannayan Riley Ruvalcaba syndrome |
| BRRS | Bannayan Ruvalcaba Riley Syndrome |
| BRRS | Bannayan–Riley–Ruvalcaba Syndrome |
| BSAS | Bosley-Salih-Alorainy Syndrome |
| BSLS | Ball Stuck to Leg Syndrome |
| BVS | Bilious Vomiting Syndrome |
| BWS | Beckwith Weidemann Syndrome |
| BWS | Beckwith Wiedemann Syndrome |
| BWS | Beginners Workout Syndrome |
| BWSS | Bacterial White Spot Syndrome |
| CACS | Celiac Axis Compression Syndrome |
| CAIS | Complete androgen insensitivity syndrome |
| CAST | Childhood Asperger Syndrome Test |
| CBAS | Camera Bag Acquisition Syndrome |
| CBDS | Capsular Bag Distension Syndrome |
| CCDANCTR | Cochrane Collaboration Depression, Anxiety and Neurosis Controlled Trials Register |
| CCDS | Cerebral Creatine Deficiency Syndromes |
| CCHS | Congenital central hypoventilation syndrome |
| CDCS | Cri Du Chat Syndrome |