| Abbreviation | Definition |
|---|---|
| AEL | Advanced Environmental Laboratories |
| AEL | Aeronautical Education Laboratory |
| AEL | American Esoteric Laboratories |
| AEL | Appalachian Educational Laboratory |
| AEL | Aquatic Ecology Laboratory |
| AEP | Acoustic Evoked Potential |
| AEP | Appropriateness Evaluation Protocol |
| AEP | Averaged Evoked Potential |
| AET | Apparent Effects Threshold |
| AF | Align Focus |
| AF | Anti-Fungal |
| AFB | Acid Fast Bacilli |
| AFB | Acid-Fast Bacillus |
| AFB | acid-fast bacill-us, -i |
| AFC | AFfinity Chromatography |
| AFC | Analytical Flow Cytometry |
| AFC | Antibody-Forming Cell |
| AFI | Amniotic Fluid Index |
| AFL | Absolute Fluid Loss |
| AFLAS | Asian Federation of Laboratory Animal Science |