holohedral forms
1Cubic crystal system — A rock containing three crystals of pyrite (FeS2). The crystal structure of pyrite is simple cubic, and this is reflected in the cubic symmetry of its natural crystal facets …
2Hemiholohedral — Hem i*hol o*he dral, a. [Hemi + holohedral.] (Crystallog.) Presenting hemihedral forms, in which half the sectants have the full number of planes. [1913 Webster] …
