| BAO | Basal Acid Output |
|---|---|
| BAP | 6-(benzylamino)purine |
| BAP | Bone alkaline phosphatase |
| BAP | Bone specific alkaline phosphatase |
| BAPN | Beta-aminoproprionitrile |
| BAPNA | alpha-N-benzoyl-DL-arginine p-nitroanilide |
| BAPNA | N-benzoyl-DL-arginine p-nitroanilide |
| BAR | Beta-adrenergic receptor |
| BAR | Biofragmentable Anastomosis Ring |
| BAR | Biofragmentable Anastomotic Ring |