arcuation
(ˌɑːkjʊˈeɪʃən) n1. (Architecture) the use of arches or vaults in buildings
2. (Architecture) an arrangement of arches
[C17: from Late Latin arcuātiō arch, from Latin arcuāre to curve]
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014