| FFI | family function index; free from infection; fundamental frequency indicator |
|---|---|
| FHF | fetal heart frequency; fulminant hepatic failure |
| FM | face mask; facilities management; family medicine; feedback mechanism; fetal movement; fibromuscular... |
| Fmed | median frequency |
| FR | failure rate; film-screen radiograph; fasciculus retroflexus; febrile reaction; feedback regulation;... |