Fistula—An ulcer.
Flatulence—Gas in the stomach or bowels.
Flooding—Uterine hemorrhage.
Fluor Albus—White flow; leucorrhœa; whites.
Flux—Diarrhœa, or other excessive discharge.
Fomentation—Warm or hot application to the body.
Friable—Easily crumbled or broken.
Friction—Rubbing with the dry hand or dry coarse cloth.
Fumigate—To smoke a room, or any article needing to be cleansed.
Function—The office or duty of any organ.