\Ar"chi*volt\, n. [F. archivolte, fr. It. archivolto;
pref. archi- + volto vault, arch. See {Vault}.] (Arch.)
(a) The architectural member surrounding the curved opening
    of an arch, corresponding to the architrave in the case
    of a square opening.
(b) More commonly, the molding or other ornaments with which
    the wall face of the voussoirs of an arch is charged.