| AO | abdominal aorta; achievement orientation; acid output; acridine orange; ankle orthosis; anodal openi... |
|---|---|
| AVO | aortic valve opening; aortic valve orifice; atrioventricular opening |
| AP | accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action potential; active p... |
| App, app | appendix |
| appx | appendix |