| Abbreviation | Definition |
|---|---|
| AESOP | Automated Endoscopic System For Optimal Positioning |
| AF | Acid-Fast |
| AF | Adult Female |
| AF | After Effects |
| AF | Amniotic Fluid |
| AF | Anti-Fatigue |
| AF | Aortic Flow |
| AF | Asked For |
| AF | Atrial Fibrillation |
| AFA | All Fluids Allowed |
| AFAP | Attenuated Familial Adenomatous Polyposis |
| AFB | Acid Fast Bacillus |
| AFB | AflaToxin B |
| AFB | AortoFemoral Bypass |
| AFC | Amniotic Fluid Cell |
| AFCP | Amniotic Fluid C Peptide |
| AFCP | Antibody Forming Cell Precursors |
| AFD | Attention Fixation Disorder |
| AFFIRM | Fibrillation Follow-up Investigation of Rhythm Management |
| AFFT | Anal Fold Fat Thickness |