Dihexagonal
Pronunciation : Di`hex*ag"o*nal
Part of Speech : a.
Etymology : [Pref. di- + hexagonal.] (a) Consisting of two hexagonal parts united; thus, a dihexagonal pyramid is composed of two hexagonal pyramids placed base to base. (b) Having twelve similar faces; as, a dihexagonal prism.
Source : Webster's Unabridged Dictionary, 1913