The Collaborative International Dictionary
Dihexagonal
Dihexagonal \Di`hex*ag"o*nal\, a. [Pref. di- + hexagonal.]
Consisting of two hexagonal parts united; thus, a dihexagonal pyramid is composed of two hexagonal pyramids placed base to base.
Having twelve similar faces; as, a dihexagonal prism.
Wiktionary
dihexagonal
a. 1 Consisting of two hexagonal parts united. 2 Having twelve similar faces.