| Abbreviation | Definition |
|---|---|
| ATF | Anterior Talofibular |
| ATFL | Anterior Talofibular Ligament |
| ATFP | Arcus Tendineus Fascia Pelvis |
| ATFP | Arcus Tendineus Fasciae Pelvis |
| ATH | Absolute Threshold of Hearing |
| ATLS | Advanced Trauma Life Support training course |
| ATM | Army Ten-Miler |
| ATM | Ataxia Telangiectasia Mutation |
| ATM | Awareness Through Movement |
| ATN | Acute tubular necrosis |
| ATNR | Asymmetrical Tonic Neck Reflex |
| ATP | adenosine (5'-)triphosphate |
| ATP | Adenosine Tri-Phosphate |
| ATP | ATtending Physician |
| ATR | Achilles Tendon Reflex |
| ATR | Advanced Tongue Root |
| ATR | Atrophy |
| ATR | Automatic Tampon Removal |
| ATR | Automatic Tampon Remover |
| ATRSULF | Atropine Sulfate |