extrados

[ek-struh-dos, -dohs, ek-strey-dos, -dohs]

noun

Architecture.

plural

extrados, extradoses 

1. the exterior curve or surface of an arch or vault.

extrados

/ ɛkˈstreɪdɒs /

noun

1. architect the outer curve or surface of an arch or vault Compare intrados

Word History and Origins

Origin of extrados¹

1765–75; < French, equivalent to extra- extra- + dos back (< Latin dorsum dorsum

Word History and Origins

Origin of extrados¹

C18: from French, from _extra- + dos back, from Latin dorsum

Example Sentences

In their monumental structures in stone, the arch was sometimes built with regular voussoirs, i.e. with a semicircular extrados, and sometimes with the joint carried far beyond.

Read more on Project Gutenberg

The under or concave side of the voussoirs is called the intrados, and the upper or convex side the extrados of the arch.

Read more on Project Gutenberg

The form of the mound may be described as reproducing the extrados of a depressed arch.

Read more on Project Gutenberg

"Are you still wondering what the extrados of a voussoir is?"

Read more on Project Gutenberg

The four sides of the mold formed the extrados, the intrados, and the two ends of the block; the other two sides being left open.

Read more on Project Gutenberg