| 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] |
| BORR | blood oxygen release rate |
| CAO2 | arterial oxygen content |