Meanings
nounextrados (plural extradoses or extrados)
plural extradoses
- architectureThe outer or upper curve of an arch.
The two lower rows of tubes at each end pier were then drilled through to the extrados of the brickwork to act as weep holes and assist in the drainage from the backs of the arches.
1954 January, “Strengthening of Coquet Viaduct”, in Railway Magazine, page 19
Origin
- Latinextra“outside”
- Frenchextradossé“outer curve”
- Englishextrados
From French extradossé (“outer curve”) from Latin extra (“outside”) + dos (“back”) (from Latin dorsum).
Full word history & related roots →Cite this entry
APA
extrados. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/extrados
MLA
“extrados.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/extrados. Accessed November 2, 2026.
Chicago
WatkinsX Dictionary, s.v. “extrados,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/extrados.
Source: extrados on Wiktionary, CC BY-SA 4.0.