| Acronym | Definition |
|---|
| ATRA➣All-Trans Retinoic Acid (aka tretinoin) |
| ATRA➣American Tort Reform Association |
| ATRA➣American Therapeutic Recreation Association (Alexandria, VA) |
| ATRA➣Automatic Transmission Rebuilders Association |
| ATRA➣Air Transport Rating Agency (Geneva, Switzerland) |
| ATRA➣Advanced Transit Association |
| ATRA➣Arizona Tax Research Association |
| ATRA➣Alberta Tobacco Reduction Alliance |
| ATRA➣Airedale Terrier Rescue and Adoption (Michigan) |
| ATRA➣Alberta Therapeutic Recreation Association |
| ATRA➣Assistive Technology Resource Alliance |
| ATRA➣American Track Racing Association |
| ATRA➣American Thai Ridgeback Association (Thai Ridgeback dog breed) |
| ATRA➣Association Tortues Rhône-Alpes (French: Association of Rhone-Alps Tortoises |
| ATRA➣Army Recruiting and Training Agency (UK MoD) |
| ATRA➣Auto and Truck Recyclers Association |
| ATRA➣Advanced Technology Reconnaissance Aircraft |
| ATRA➣Afghan Telecommunications Regulatory Authority |