1. the small flat face at the bottom of a cut diamond or gemstone
Usage: jewelry and gemology term
2. a piece of armor protecting the lower back and hips
Usage: historical; part of plate armor

Examples

• The jeweler examined the culet of the diamond under magnification.
• A well-proportioned culet enhances the diamond's brilliance.
• The knight's culet was dented from the battle.
• Medieval armorers crafted the culet to fit snugly over the wearer's lower body.
• The culet on this gemstone is slightly too large for optimal light reflection.