Formication. A sensation like that of the creeping of ants.
Formula. Prescriptions; given forms.
Fossa. A depression in a bone.
Frenum. A bridle; a binding or restraining membrane.
Fundus. The larger part of a cone shaped organ.
Funis. The umbilical cord; the naval string.
Furuncle. A boil.
Gall-stones. Concretions formed from the bile.
Ganglion. An enlargement in the course of a nerve.
Gangrene. Partial death; mortification.