extrados /ek-strāˈdos/ (architecture)

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

• imponderabilities
• imponderability
• imponderable
• imponderableness
• imponderables
• imponderably
• imponderous
• impone
• imponed
• imponent
• imponents
• impones
• imponing
• import
• importable
• importance
• importances
• importancy
• important
• importantly
• importation
• importations
• import duties
• import duty
• imported