Origin: Latin

L. falx = sickle, and forma = form. The Lig. falciforme  has this shape.

L. femur = thigh, but applied to the bone of the upper leg. The adjective femora is used of various structures in the thigh.

L. fibula = a clasp or a pin; originally from figo = fasten.

L. flectere =  to bend. From the same root comes the word flex, flexion, and flexure = a fold or crease.

L. folliculus, diminutive of follis = a bag.

L. foramen = an opening; from forare = to bore.

L. fornix = arch or vault.

L. fossa = a ditch. Used in anatomy for depressed areas.