| BAS | Balloon Atrio-Septostomy |
|---|---|
| BAS | balloon atrial septostomy; benzyl anti-serotinin; beta-adrenergic stimulation; boric acid solution |
| BaS | barium swallow |
| bas | basilar; basophil, basophilic |
| BASA | Boston Assessment of Severe Aphasia |
| BASE | B27-arthritis-sacroiliitis-extra-articular features [syndrome] |
| BASH | body acceleration synchronous with heart rate |
| BASIC | Beginner's All-Purpose Symbolic Introduction Code |
| baso | basophil |