| Abbreviation | Definition |
|---|---|
| ARA | Anthracycline Resistance Associated |
| ARB | Angiotensin Receptor Blocker |
| ARC | Antigen Responsive Cell |
| ARCC | Applied Research in Cancer Control |
| ARDL | Advanced Research and Diagnostic Laboratory |
| ARDL | Akron Rubber Development Laboratory |
| ARF | Adp Ribosylation Factor |
| ARL | Aerospace Robotics Laboratory |
| ARL | Analytical Research Laboratory |
| ARL | Applications and Research Laboratory |
| ARL | Applied Research Laboratory |
| ARL | Aquatic Research Laboratory |
| ARLN | Antibiotic Resistance Laboratory Network |
| ARMS | Amplification Refractory Mutation System |
| ART | Advanced Release Technology |
| ART | Advanced Reproductive Technologies |
| ARVL | Action Research Virtual Laboratory |
| AS | Androgen Suppression |
| ASCA | Anti-Saccharomyces Cerevisiae Antibody |
| ASCL | Affective Social Computing Laboratory |