The Collaborative International Dictionary
Holohedral
Holohedral \Hol`o*he"dral\, a. [Holo- + Gr. ? seat, base, fr. ? to sit.] (Crystallog.) Having all the planes required by complete symmetry, -- in opposition to hemihedral.
Wiktionary
holohedral
a. (context of a crystal English) Having as many plane faces as needed for the highest degree of symmetry in its system