ˈärkəˌvōlt, ˈȧk- noun
( -s )
Etymology: Italian archivolto, from Medieval Latin archivoltum, probably modification (influenced by Medieval Latin archi- bow, from Latin arqui-, arci-, from arcus ) of Old French arvolt, arcvolt arch, arcade, from arc arch (from Latin arcus ) + volt curved, from (assumed) Vulgar Latin volvitus, past participle of Latin volvere to roll — more at arrow , voluble
1. : the architectural member or members forming the inner surface of an arch
2.
a. : the usually ornamental band or molding surrounding an arch and corresponding to the architrave of a rectangular opening
b. : the molding or other ornaments on the wall face of the voussoirs