extrados

noun ex·tra·dos \ ˈek-strə-ˌdäs , -ˌdō ; ek-ˈstrā-ˌdäs \

Definition of extrados

plural extradoses play \ˈek-strə-ˌdä-səz\ or extrados play \ˈek-strə-ˌdōz, -ˌdäs\
:the exterior curve of an arch — see arch illustration

Origin and Etymology of extrados

French, from Latin extra + French dos back — more at dossier


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