ACTB
| Acronym | Definition |
|---|---|
| ACTB | Actin, Beta |
| ACTB | Advanced Chemical Technology Building (University of Illinois at Chicago) |
| ACTB | AIDS Committee of Thunder Bay (now AIDS Thunder Bay; Canada) |
| ACTB | Albany County Tourism Board (Laramie, WY) |
| ACTB | Aviation Combat Test Branch (Marine Corps Operational Test & Evaluation Activity) |