Home › Words › I › icosihexahedronicosihexahedronicosihexahedron · noun — A polyhedron with twenty-six faces.Definition from Wiktionary (CC BY-SA 3.0).EtymologyFrom icosi- + hexa- + -hedron.nounA polyhedron with twenty-six faces.e.g.“For quotations using this term, see Citations:icosihexahedron.”Definitions & examples from Wiktionary (CC BY-SA 3.0).