| Abbreviation | Definition |
|---|---|
| ACS | Acute Cervical Sprain |
| ACS | Acute Cervical Strain |
| ACS | Acute Coronary Syndrome |
| ACS | American Cancer Society |
| ACS | AntiCholinergic Syndrome |
| ACSEP | Australasian College of Sport Exercise Physicians |
| ACSF | Artificial Cerebral Spinal Fluid |
| ACSF | artificial cerebrospinal fluid |
| ACSM | American College of Sports Medicine |
| ACT | Active Motion |
| ACT | Adaptive Control of Thought |
| ACT | AntiCoagulant Therapy |
| ACTA | Adrenocorticotropic Hormone |
| ACTH | AdrenoCorticoTropic Hormone (Corticotropin) |
| ACTN3 | alpha-actinin 3 |
| ACTS | Acute Cervical Trauma Syndrome |
| ACUV | Air Contrast Ultrasound Venography |
| ACVD | Acute Cardio-Vascular Disease |
| ACWD | Adolescent Coping With Depression |
| AD | Abdominal Diaphragmatic breathing |