| Abbreviation | Definition |
|---|---|
| FAI | Field Aligned Irregularity |
| FC | Field Core |
| FCFZ | Furnace Creek Fault Zone (California) |
| FCMG | Fossilized Coral Mineral Granule |
| FDRS | Field Data Reporting System |
| FEC | Florida East Coast |
| FFID | Field File Identification |
| FGGM | Fine-Grained Ground Mass |
| FIG | Féderation Internationale des Géomètres |
| FIMO | Federal Indian Minerals Office |
| FP | Fracture Plane |
| FPF | Fixed Point Free |
| FRD | Field Re-Development |
| FS | Field Stones |
| FTFET | Four-Terminal Field Effect Transistor |
| FTFZ | Fifteen Twenty Fracture Zone |
| FVF | Formation Volume Fraction |
| FVST | Field Vane Shear Test |
| FWL | Free Water Level |
| FZ | Fracture Zone |