Fenwick - Foley catheter
- first-generation cephalosporin
- first-line
- first-pass extraction
- FIS
- fis
- FISAC
- Fischer
- Fischer 344 rat
- Fischer projection formula
- FISH
- fish berry
- Fish bowl granuloma
- fish eye disease
- Fish oil, omega-3
- fish poisoning
- fish protein concentrate
- fish skin
- fish tank granuloma
- fish tapeworm
- fish-liver oil
- fish-mouth meatus
- Fish-odor syndrome
- Fishberg
- Fishberg concentration test
- Fishberg concentration test
- Fishberg method
- Fisher
- Fisher brace
- Fisher exact test
- Fisher exact test
- Fisher syndrome
- Fisher syndrome
- Fisher’s exact test
- Fishman-Lerner unit
- fishmouth mitral stenosis
- fishpox
- fishskin disease
- Fiske and Subbarow's method
- FISP
- FISS
