Also found in: Encyclopedia.


a.1.Consisting of two hexagonal parts united; thus, a dihexagonal pyramid is composed of two hexagonal pyramids placed base to base.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
The crystallite phase of ZnO matches with PDF: 80-0075 with a space group P63mc of dihexagonal pyramidal class.
Careful measurement places the three models in the dihexagonal pyramidal class of modern crystallography.
Calcite crystallizes in a trigonal-hexagonal cell and typically forms scalenohedral (rhombohedrons) crystals, aragonite has an orthorhombic cell with dipyramidal (needles) shaped crystals, and vaterite has a hexagonal cell with dihexagonal dipyramidal (discs) shaped crystals.