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.