extrados /ek-strāˈdos/ (architecture)

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

• bath salts
• bath sheet
• bath sheets
• Bath stone
• bath-towel
• bath-towels
• bathtub
• bathtubs
• bathy-
• bathyal
• bathybius
• bathybiuses
• bathygraphical
• bathylite
• bathylites
• bathylith
• bathylithic
• bathyliths
• bathylitic
• bathymeter
• bathymeters
• bathymetric
• bathymetrical
• bathymetries
• bathymetry