| Abbreviation | Definition |
|---|---|
| ARF | ADP-ribosylation factor |
| ARF | ambulance report form |
| ARF | Annual Retention Fee |
| ARG | Academic Review Group |
| ARG | amphiregulin |
| ARG | arginine |
| ARG | autoradiography |
| ARHAI | Antimicrobial Resistance and Healthcare Associated Infections |
| ARIF | Aggressive Research Intelligence Facility |
| ARM | age-related maculopathy |
| ARM | anaesthesia-resistant memory |
| ARM | anorectal malformation |
| ARM | anorectal manometry |
| ARM | Association of Radical Midwives |
| ARM | ATP regulatory module |
| ARMA | American Reiki Masters Association |
| ARMS | At Risk Mental State |
| ARMUGXX | Airborne Radioactivity Monitoring Users Group |
| arPEO | autosomal recessive progressive external ophthalmoplegia |
| ARSAC | Administration of Radioactive Substances Advisory Committee |