| Abbreviation | Definition |
|---|---|
| AFIB | Atrial Fibrillation |
| AFIU | Abnormal Focal Increased Uptake |
| AFL | Artificial limb |
| AFLP | Acute Fatty Liver of Pregnancy |
| AFO | Ankle Foot Orthoses |
| AFO | Ankle Foot Orthosis |
| AFP | Acute Flaccid Paralysis |
| AFP | Alpha FetoProtein |
| AFR | Aortic Flow Rate |
| AFT | Accelerated failure time |
| AFT | Animal Facilitated Therapy |
| AFTER | Assessment Feedback Treatment Education And Recommendations |
| AFTN | Autonomously Functioning Thyroid Nodule |
| AFTR | Atrophy, fasciculation |
| AFTR | Rigidity |
| AFTR | Tremor |
| AFV | Amniotic Fluid Volume |
| AG | Antigen |
| AG | Aspiration Goal |
| AGA | Appropriate for Gestational Age |