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.