intrados

[in-truh-dos, -dohs, in-trey-dos, -dohs] /ˈɪn trəˌdɒs, -ˌdoʊs, ɪnˈtreɪ dɒs, -doʊs/
noun, plural intrados
[in-truh-dohz, in-trey-dohz] /ˈɪn trəˌdoʊz, ɪnˈtreɪ doʊz/ (Show IPA),
intradoses. Architecture
1.
the interior curve or surface of an arch or vault.
Compare extrados.
Origin
1765-75; < French, equivalent to intra- intra- + dos back; see dosser
Examples from the web for intrados
  • Terra cotta tiles, matching the original tiles of the west facade, are placed on the intrados of the entrance.
  • The arch has a central molded keystone, carved extrados and paneled intrados.
British Dictionary definitions for intrados

intrados

/ɪnˈtreɪdɒs/
noun (pl) -dos, -doses
1.
(architect) the inner curve or surface of an arch or vault Compare extrados
Word Origin
C18: from French, from intra- + dos back, from Latin dorsum