The interior curve of an arch; esp., the inner or lower curved face of the whole body of voussoirs taken together. See Extrados.
The under surface of an arch or vault
The concave curve of an arch. The lower surface of the voussoirs (when in position) of a masonry arch.
The inside line of an Arch
inner face of voussoirs. (also soffit).
The curve which bounds the lower edge of the arch. The distinction between soffit and intrados is that the intrados is a line, while the soffit is a surface.
The concave curve that bounds the lower side of the arch.
The interior arc of an arch.
The inner portion of an arch.
The inner curve or underside of an arch. Also known as a soffit.
The inside curve or surface of an arch or vault.