| BAR | Biofragmentable Anastomotic Ring |
|---|---|
| BARI | Bypass Angioplasty Revascularization Investigation |
| BAS | Balloon Atrial Septostomy |
| BASDAI | Bath Ankylosing Spondylitis Disease Activity Index |
| BASFI | Bath Ankylosing Spondylitis Functional Index |
| basic FGF | Basic fibroblast growth factor |
| BASMC | bovine aortic smooth muscle cell |
| BAT | Brown Adipose Tissue |
| BAT | blunt abdominal trauma |
| BAU | 5-Benzylacyclouridine |