| DFG | direct forward gaze; German Research Federation [Deutsche Forshungsgemeinschaft] |
|---|---|
| FF | degree of fineness of abrasive particles; fat-free; father factor; fecal frequency; fertility factor... |
| FSV | feline fibrosarcoma virus; forward stroke volume; functional subunit |
| HF | Hageman factor; haplotype frequency; hard filled [capsule]; hay fever; head of fetus; head forward; ... |