| ALEC | artificial lung-expanding compound |
|---|---|
| ANN | artificial neural network |
| AP | accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action potential; active p... |
| APIVR | artificial pacemaker-induced ventricular rhythm |
| ARM | adrenergic receptor material; aerosol rebreathing method; ambulatory renal monitor; anorectal manome... |