The Collaborative International Dictionary
Prismoidal
Prismoidal \Pris*moid"al\, a. Having the form of a prismoid; as, prismoidal solids.
Wiktionary
prismoidal
a. Having the form of a prismoid.
Usage examples of "prismoidal".
It spired into the sky, columnar and prismoidal, light and dark bands alternating along its height.