| Abbreviation | Definition |
|---|---|
| ABH | ABO blood group antigens (A = type A; B = type B; H = typo O) |
| ABIL | Accessible Biomedical Immersion Laboratory |
| ABL | Advanced Biological Laboratories |
| ABL | Advanced Bioscience Laboratories |
| ABL | Aquatic Bioassessment Laboratory |
| ABL | Auke Bay Laboratories |
| ABN | Abnormal |
| ABP | Actin Bundling Protein |
| ABS | Able-Bodied Subject |
| ABS | Absorbed |
| ABT | Applied Biological Technology |
| ABTL | Asphalt Binder Testing Laboratory |
| ABU | Acceptance for Beneficial use |
| AC | Active Component |
| AC | Anticoagulation Clinic |
| ACA | Anhydrous Codeine Alkaloid |
| ACAL | Advanced Computer Architecture Laboratory |
| ACAM | Australian Centre for Asthma Monitoring |
| ACC | Absolute Concentration Curve |
| ACCL | Advanced Computational Concepts Laboratory |