Extrados

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    The 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."

  2. 2
    the exterior curve of an arch wordnet

Synonyms

All synonyms
intrados

Example

More examples

"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."

Etymology

From French extradossé (“outer curve”) from Latin extra (“outside”) + dos (“back”) (from Latin dorsum).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.