extrados

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

noun

, Architecture.

, plural ex·tra·dos [ek, -str, uh, -dohz, ek-, strey, -dohz], ex·tra·dos·es.

1. the exterior curve or surface of an arch or vault. Compare intrados ( def ).

extrados

/ ɛkˈstreɪdɒs /

noun

1. See intrados
   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

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

From Project Gutenberg

This arch was roughhewn on the flat surfaces and on about half of the outer curved surface, or extrados.

From Project Gutenberg

The inner surface, or intrados, and the remainder of the extrados are smoothly dressed (fig. 38).

From Project Gutenberg

The pavement of the terrace, which consists of a double bed of large bricks, rests upon the extrados of the upper channel.

From Project Gutenberg

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

From Project Gutenberg