| Abbreviation | Definition |
|---|---|
| FEZ | Frontonasal Ectodermal Zone |
| FF | Formula Feeding |
| FF | Forward flexion |
| FFA | Fusiform Face Area |
| FFAII | Free Fatty Acid-Induced Insulin |
| FFBC | Front Foot Benefit Charge |
| FFD | Free From Disability |
| FFDA | Families for Depression Awareness |
| FFF | Fat, Fast, and Forty |
| FFF | Features For Feet |
| FFI | Foot Function Index |
| FFM | Fat Free Mass |
| FFR | fractional flow reserve |
| FFROM | Full, free range of motion |
| FFS | Facial Feminizing Surgery |
| FFT | Forward flexion: fingertips to toes |
| FGD | Familial Glucocorticoid Deficiency |
| FGD | Functional Gastrointestinal Disorder |
| FGPT | The Fitness Gram Test |
| FGR | Fetal Growth Restriction |