| Abbreviation | Definition |
|---|---|
| A1AT | alpha-1-antitrypsin |
| A1C | Glycated Hemoglobin |
| A2N | Anaerobic-Anoxic/Nitrification |
| AABA | American Association of Biological Anthropologists |
| AABS | Autoantibodies |
| AAM | American Academy of Microbiology |
| AAMB | All About Molecular Biology |
| AAMCC | American Association for Medical Chronobiology and Chronotherapeutics |
| AAOB | Aerobic Ammonia Oxidizing Bacteria |
| AAOB | Anaerobic Ammonium Oxidizing Bacteria |
| ABATS | Automated Biological Agent Testing System |
| ABBM | Adipose Biology Basic Mechanisms |
| ABCD | Access to Biological Collection Data |
| ABCS | Aeromedical Biological Containment System |
| ABEB | Aquatic Behavioural Evolutionary Biology |
| ABI | Advances in Biological Informatics |
| ABI | Artificial Biological Intelligence |
| ABL | Advanced Biological Laboratories |
| ABM | Applied Biological Materials |
| ABMI | Alberta Biodiversity Monitoring Institute |