the outside curve of an arch; esp., the top of curved face of the whole body of voussoirs. See intrados.
the top of or convex area of an arch or of a vault.
The exterior curve of a voussoir. See arch, 2.
In mech., the locus of the lower stops of cables, of consistent body weight per device of size, holding down from points on a cord that is completely versatile, inextensible, and without weight. As soon as the wires tend to be equally distant from another as well as equal size, the extrados is a parabola.
the exterior curve of an arch
the top of or outside curve of an arch.
The external or top bend of an arch.
the outside bend of an arch; esp., top of the curved face of this body of voussoirs. See intrados.
top of the or convex surface of an arch or of a vault.
The external bend of a voussoir. See arch, 2.
In mech., the locus associated with the lower finishes of wires, of consistent fat per unit of length, hanging down from things on a cord which will be perfectly flexible, inextensible, and without body weight. As soon as the wires are similarly distant from 1 another as well as equal size, the extrados is a parabola.