Etymograph

English

extrados

Extrados comes from French extradossé ‘outer curve’.

  1. Frenchc. 1600–presentextradossé‘outer curve’
  2. Englishearliest quotation 1954extrados

attested reconstructed ? uncertain or disputed

Lineage

  1. Frenchc. 1600–presentextradossé‘outer curve’
  2. Englishearliest quotation 1954extrados

Earliest quotation: 1954, Strengthening of Coquet Viaduct: “The two lower rows of tubes at each end…”

A compound of extra ‘outside’ + dos ‘back’

Proto-Indo-European *bʰer- ‘to bear, carry’

Proto-Indo-European *bʰéreti ‘to bear, carry’

Proto-Italic *ferō ‘to carry, bear’

Latin ferō ‘to bear, carry, bring’

Latin auferō ‘to take away’

Latin ablātīvus

Latin extra ‘outside’

Proto-Indo-European *deh₃- ‘give’

Proto-Indo-European *déh₃tis ‘giving’

Proto-Italic *dōtis

Latin dos ‘back’

Today it means

noun The outer or upper curve of an arch.

Language periods are conventional ranges, not dates for this word.

Etymograph / French extradossé / extrados