| FFI | family function index; free from infection; fundamental frequency indicator |
|---|---|
| fn | function |
| FS | factor of safety; Fanconi syndrome; Felty syndrome; fibromyalgia syndrome; field stimulation; Fisher... |
| FSI | foam stability index; Food Sanitation Institute; functional status index; function status index |
| FT | Fallot tetralogy; false transmitter; family therapy; fast twitch; fatigue trial; fibrous tissue; fin... |