| FESS | functional endoscopic sinus surgery |
|---|---|
| FHL | flexor hallucis longus; functional hearing loss |
| FIM | field ion microscopy; functional independence measure |
| FL | fatty liver; feline leukemia; femur length; fibers of Luschka; fibroblast-like; filtration leukapher... |
| FLIC | functional living index-cancer |