1911 Encyclopædia Britannica/Intrados
INTRADOS (a French term, Lat. intra, within, Fr. dos, back), in architecture, the under-curved surface or soffit of an arch (q.v.).
See also Intrados on Wikipedia; and our 1911 Encyclopædia Britannica disclaimer.
INTRADOS (a French term, Lat. intra, within, Fr. dos, back), in architecture, the under-curved surface or soffit of an arch (q.v.).