extrados /ek-strāˈdos/ (architecture)

1. The convex surface of an arch
2. The external curve of the keystone of an arch

• knell
• knelled
• knelling
• knells
• knelt
• Knesset
• knevell
• knew
• knicker
• knickerbocker
• knickerbocker glories
• knickerbocker glory
• knickerbockers
• knickered
• knickerless
• knickers
• knick-knack
• knick-knackatory
• knick-knackeries
• knick-knackery
• knick-knacket
• knick-knacks
• medullate
• medullated
• Medusa