| Abbreviation | Definition |
|---|---|
| APLM | Archives of Pathology and Laboratory Medicine |
| APP | Amyloid Precursor Protein |
| APPL | Advanced Plant Phenotyping Laboratory |
| APRL | Addiction and Pharmacology Research Laboratory |
| APRL | Addiction Pharmacology Research Laboratory |
| APRL | Advanced Propulsion Research Laboratory |
| APRL | Archaeological Preservation Research Laboratory |
| APRL | Atmospheric Physics Research Laboratory |
| APS | Advanced Photographic System |
| APTB | AdenomaPolyp Tissue Bank |
| APTF | Acoustic Pressure Tank Facility |
| APTF | Australian Photobiology Testing Facility |
| APTL | Accredited POSIX Testing Laboratory |
| APTL | Advanced Packaging Technology Laboratories |
| APTL | Advanced Phase Transformation Laboratory |
| APTL | Aerosol Particle Technology Laboratory |
| APTT | Activate Partial Thromboplastin Time |
| APTT | Activated Partial Thromboplastin Time |
| aPTT | Activated Plasma Thromboplastin Time |
| ARA | Angiotensin Receptor Antagonist |