folia - GALV
- four-point assay
- four-point gait
- four-tailed bandage
- fourchette
- Fourier
- Fourneau
- Fourneau 309
- Fourneau 710
- Fourneau 933
- Fournier
- Fournier disease
- Fournier gangrene
- Fournier gangrene (disease) test
- Fournier teeth
- Fournier test
- fourth circulation
- Fourth cranial nerve
- Fourth disease
- fourth finger
- fourth heart sound
- fourth heart sound gallop
- fourth nerve
- fourth nerve palsy
- Fourth stage of labor
- fourth toe
- Fourth ventricle
- fourth ventricle of brain
- fourth-degree burn
- fourth-degree frostbite
- fourth-generation cephalosporin
- FOUV
- FOV
- fovea
- fovea articularis capitis radii
- fovea capitis femoris
- Fovea centralis
- fovea centralis retinae
- fovea costalis inferior
- fovea costalis processus transversi
- fovea costalis superior
