| CAO | chronic airway obstruction; coronary artery obstruction |
|---|---|
| SAO | small airway obstruction; splanchnic artery occlusion; subvalvular aortic obstruction |
| LUP | left ureteropelvic |
| UP | parallax unsharpness; ulcerative proctitis; ultrahigh purity; unipolar; upright posture; ureteropelv... |
| UPJ | ureteropelvic junction |