culet /kūˈlit/

1. The flat back or base of a brilliant-cut gemstone
2. Armour protecting the hips and buttocks

• refrigerating
• refrigeration
• refrigerations
• refrigerative
• refrigerator
• refrigeratories
• refrigerators
• refrigeratory
• refringe
• refringed
• refringencies
• refringency
• refringent
• refringes
• refringing
• refroze
• refrozen
• refs
• reft
• refuel
• refuelable
• refuellable
• refuelled
• refuelling
• refuels