extrados
noun
ex·tra·dos ˈek-strə-ˌdäs 
-ˌdō;
ek-ˈstrā-ˌdäs
plural extradoses ˈek-strə-ˌdä-səz or extrados ˈek-strə-ˌdōz
or extrados ˈek-strə-ˌdōz -ˌdäs
: the exterior curve of an arch see arch illustration
Word History
Etymology
French, from Latin extra + French dos back — more at dossier
First Known Use
1772, in the meaning defined above
- triblastic
- triblet
- triblets
- tribo-
- triboelectric
- triboelectric series
- triboelectricities
- triboelectricity
- tribolia
- Tribolium
- triboliums
- tribolobies
- tribolobyes
- tribolobys
- tribological
- tribologies
- tribologist
- tribologists
- tribology
- triboluminescence
- triboluminescences
- triboluminescent
- tribometer
- tribometers
- tribon