| Abbreviation | Definition |
|---|---|
| FABM | Fly Ash Bound Mixture |
| FACOEM | Fellow American College of Occupational and Environmental Medicine |
| FACTS | Forest Atmosphere Carbon Transfer and Storage |
| FAEC | Fundacion Argentina Ecologia Cientifica |
| FAMD | Fisheries and Aquacultrure Management Division |
| FAST | Fixed Activated Sludge Treatment |
| FATCUNTSUPYOURARSE | LOL! |
| FAWB | forced air warming blanket |
| FBACS | Fuel Building Air Cleanup System |
| FBTR | Fast Breeder Test Reactor (India) |
| FCA | Flow Constrained Area |
| FCAA | Federal Clean Air Act |
| FCAL | Forest County Association of Lakes |
| FCB | Fisheries Conservancy Board (N.I., defunct) |
| FCCC | Framework Convention on Climate Change |
| FCEC | Ford Calumet Environmental Center |
| FCF | Fuel Cycle Facility |
| FCFR | Freshwater Creek Forest Reserve |
| FCFU | Federation of Community Forest Users |
| FCR | Forest Carbon Resource |