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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. 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


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Word History and Origins

Origin of extrados1

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

Origin of extrados1

C18: from French, from extra- + dos back, from Latin dorsum
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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.

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

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

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

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

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extraditionextradosed