| AO | abdominal aorta; achievement orientation; acid output; acridine orange; ankle orthosis; anodal openi... |
|---|---|
| AVO | aortic valve opening; aortic valve orifice; atrioventricular opening |
| VUR | Vesico-Urethral(Ureteral) Reflux |
| VU shunt | Ventriculo-Ureteral shunt |
| BOU | branchio-oto-ureteral [syndrome] |