| AER | abduction/external rotation; acoustic evoked response; acute exertional rhabdomyolysis; agranular en... |
|---|---|
| AI | accidental injury; accidentally incurred; adiposity index; aggregation index; allergy and immunology... |
| AP | accessory pathway; accounts payable; acid phosphatase; acinar parenchyma; action potential; active p... |
| Ap4CH | apical four-chamber plane |
| AR | absolute risk; accounts receivable; achievement ratio; actinic reticuloid [syndrome]; active resista... |