extrados /ek-strāˈdos/ (architecture)

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

• sheesha pipe
• sheeshas
• sheet
• sheet anchor
• sheet anchors
• sheet bend
• sheet bends
• sheet copper
• sheeted
• sheet-feed
• sheet-feeded
• sheet-feeder
• sheet-feeders
• sheet-feeding
• sheet-feeds
• sheet film
• sheet-glass
• sheetier
• sheetiest
• sheeting
• sheetings
• sheet iron
• sheet lead
• sheet lightning
• sheet metal