[ek-struh-dos, -dohs, ek-strey-dos, -dohs]
- the exterior curve or surface of an arch or vault.
Origin of extrados
Also called back.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for extrados
The under or concave side of the voussoirs is called the intrados, and the upper or convex side the extrados of the arch.
The lower surface or soffit of the arch is the intrados, E, and the upper surface the extrados, F.
The Tuscan arch, where the extrados takes the form of a pointed arch.
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.Concrete Construction
Halbert P. Gillette
The pavement of the terrace, which consists of a double bed of large bricks, rests upon the extrados of the upper channel.A History of Art in Chalda & Assyria, v. 1
- architect the outer curve or surface of an arch or vaultCompare intrados
C18: from French, from extra- + dos back, from Latin dorsum
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