| CAO | chronic airway obstruction; coronary artery obstruction |
|---|---|
| SAO | small airway obstruction; splanchnic artery occlusion; subvalvular aortic obstruction |
| BLOBS | bladder obstruction |
| BNO | bladder neck obstruction; bowels not opened |
| BO | Bachelor of Osteopathy; base of prism out; behavior objective; belladonna and opium; body odor; bowe... |