| AVDO2B | arteriovenous oxygen saturation difference, basal |
|---|---|
| AVO2 | arteriovenous oxygen ratio |
| BLB | Baker-Lima-Baker [mask]; Bessey-Lowry-Brock [method or unit]; black light bulb; Boothby-Lovelace-Bul... |
| BOC | blood oxygen capacity; Bureau of Census; butyloxycarbonyl |
| BOD | biochemical oxygen demand; brachymorphism-onychodysplasia-dysphalangism [syndrome] |