extrados /ek-strāˈdos/ (architecture)

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

• long face
• long-faced
• long faces
• long field
• long fields
• long-firm
• long-firms
• long-hair
• long-haired
• long-hairs
• longhand
• longhands
• long haul
• long-haul
• long hauls
• long-head
• long-headed
• long-headedness
• long-heads
• long home
• long hop
• long hops
• longhorn
• longhorns
• longhouse