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extrados

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

noun

Architecture.
extradoses plural
  1. the exterior curve or surface of an arch or vault.


extrados British  
/ ɛkˈstreɪdɒs /

noun

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

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of extrados

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

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The stability of such structures depends on the position of the line of pressure in relation to the extrados and intrados of the arch ring.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Part 3 "Brescia" to "Bulgaria" by Various

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

In one division the bedding of the bricks is strictly horizontal; in the next it is slightly concave, and forms a very flat reversed arch, of which the extrados rests upon the ground.

From Manual of Egyptian Archaeology and Guide to the Study of Antiquities in Egypt by Maspero, G. (Gaston)

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

From Concrete Construction Methods and Costs by Gillette, Halbert Powers

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