extrados

American  

[ek-struh-dos, -dohs, ek-strey-dos, -dohs] / ˈɛk strəˌdɒs, -ˌdoʊs, ɛkˈstreɪ dɒs, -doʊs /

noun

Architecture.

plural

extrados, extradoses

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

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extrados British  

/ ɛkˈstreɪdɒs /

noun

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

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Etymology

Origin of extrados

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

Example Sentences

The Tuscan arch, where the extrados takes the form of a pointed arch.

From Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 4 "Aram, Eugene" to "Arcueil" by Various

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

From A History of Art in Chaldæa & Assyria, v. 1 by Armstrong, Walter, Sir

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

From The New Gresham Encyclopedia. Vol. 1 Part 2 Amiel to Atrauli by Various

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

From The Strange Case of Mortimer Fenley by Tracy, Louis

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

From A History of Art in Chaldæa & Assyria, v. 1 by Armstrong, Walter, Sir