| ARN | Acute retinal necrosis syndrome |
|---|---|
| ARN | Afferent renal nerves |
| ARN | arcuate nucleus |
| ARNA | afferent renal nerve activity |
| ARNT | AHR nuclear translocator |
| ARNT | AHR nuclear translocator protein |
| Arnt | Ah recceptor nuclear translocator |
| Arnt | Aryl hydrocarbon receptor nuclear translocator |
| ARO | Arochlor 1254 |
| ARO | aromatase |