Definition of intrados in English:

intrados

noun

Architecture
  • The lower or inner curve of an arch.

    ‘The intrados or the inner rim of the arch shows its most distinctive feature - a fringe of lotus-bud carving.’
    Often contrasted with extrados

Origin

Late 18th century from French, from intra- ‘on the inside’ + dos ‘the back’ (from Latin dorsum).

Pronunciation

intrados

/ɪnˈtreɪdɒs/