falx 
(fălks, fôlks)
(fălks, fôlks)n. pl. fal·ces (fălsēz′, fôl-)
A sickle-shaped anatomical structure.
[Latin, sickle.]
- free world
- freewrite
- freewriting
- freezable
- freeze
- freeze blood
- freeze-dry
- freeze-etch
- freeze-etching
- freeze-frame
- freeze frame
- freeze out
- freezer
- freezer burn
- freeze (someone's) blood
- freeze someone's blood
- freezing point
- free zone
- F region
- Freiburg
- freight
- freightage
- freight car
- freighter
- freight train