Archivolt
Webster's Dictionary [1]
(1): (n.) More commonly, the molding or other ornaments with which the wall face of the voussoirs of an arch is charged.
(2): (n.) The architectural member surrounding the curved opening of an arch, corresponding to the architrave in the case of a square opening.
Cyclopedia of Biblical, Theological and Ecclesiastical Literature [2]
(French from Lat. arcus volutus), the under curve or' surface of an arch, from impost to impost. The archivolt is sometimes quite plain, with square edges, in which case the term sofit is applicable to it. This kind of archivolt is used in the Roman and Romanesque styles, including those buildings in England which are by some considered as Saxon and in the Early Norman. In later Norman work it usually has the edges moulded or chamfered off; and towards the end of that style, and throughout all the Gothic styles, it is frequently divided into several concentric portions, each projecting beyond that which is beneath (or within) it,
