| BI | background interval; bacterial or bactericidal index; base-in [prism]; basilar impression; Billroth ... |
|---|---|
| BII | beat inclusion index; Billroth II [operation]; butanol-insoluble iodine |
| BOR | basal optic root; before time of operation; bowels open regularly; branchio-oto-renal [syndrome] |
| HAZWOPER | Hazardous Waste Operation and Emergency Response [of OSHA] |
| OP | occipitoparietal; occipitoposterior; occiput posterior; octapeptide; olfactory peduncle; opening pre... |