extrados /ek-strāˈdos/ (architecture)

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

• -uria
• urial
• urials
• -uric
• uric
• uric acid
• uricase
• uricases
• Uriconian
• uridine
• uridines
• Urim and Thummim
• urinal
• urinals
• urinalyses
• urinalysis
• urinant
• verven
• vervens
• verves
• vervet
• vervets
• very
• very approximate
• very good