extrados /ek-strāˈdos/ (architecture)

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

• fieldward
• fieldwards
• fieldwork
• fieldworker
• fieldworkers
• fieldworks
• fiend
• fiendish
• fiendishly
• fiendishness
• fiendishnesses
• fiendlike
• fiends
• fient
• fients
• fier
• fierce
• fiercely
• fierceness
• fiercenesses
• fiercer
• fiercest
• fiere
• fieres
• fierier