ˌ ̷ ̷ ̷ ̷ˈwāshən noun
( -s )
Etymology: Latin arcuation-, arcuatio arch, from arcuatus + -ion-, -io -ion
1. : an arching or curving : incurvation
the arcuation of the face of a cliff
2. architecture : the employment of arches ; also : a system of arches