| HOLOHEDRA | • holohedra n. Plural of holohedron. • HOLOHEDRON n. a geometrical form possessing the property of holohedrism. |
| OCTOHEDRA | • octohedra n. Plural of octohedron. • OCTOHEDRON n. (Greek) a solid bounded by eight plane faces, also OCTAHEDRON. |
| HOLOHEDRAL | • holohedral adj. (Of a crystal) Having as many plane faces as needed for the highest degree of symmetry in its system. • HOLOHEDRAL adj. having all the planes required by complete symmetry, as opposed to hemihedral. |
| PYRITOHEDRA | • pyritohedra n. Plural of pyritohedron. • PYRITOHEDRON n. a pentagonal dodecahedron. |
| RHOMBOHEDRA | • rhombohedra n. Plural of rhombohedron. • RHOMBOHEDRON n. a parallelepiped whose faces are rhombuses. |
| LEUCITOHEDRA | • LEUCITOHEDRON n. the cubic icositetrahedron, simulated by typical leucite crystals. |
| PYRITOHEDRAL | • pyritohedral adj. Having the shape of pyrites. • pyritohedral adj. (Mathematics) Having the shape of a pyritohedron. • PYRITOHEDRAL adj. of or like a pyritohedron, a pentagonal dodecahedron. |
| RHOMBOHEDRAL | • rhombohedral adj. (Crystallography) Having three equal axes and oblique angles. • RHOMBOHEDRAL adj. shaped like a rhombohedron. |
| SCALENOHEDRA | • scalenohedra n. Plural of scalenohedron. • SCALENOHEDRON n. a hemihedral form bounded in the hexagonal system by twelve, in the tetragonal by eight, faces, each a scalene triangle. |
| TRAPEZOHEDRA | • trapezohedra n. Plural of trapezohedron. • TRAPEZOHEDRON n. a crystalline form whose faces are trapeziums. |
| TETARTOHEDRAL | • tetartohedral adj. (Crystallography) isometric and tetragonal, but having one fourth of the number of planes required for… • TETARTOHEDRAL adj. having one fourth the number of planes required by complete symmetry. |
| TRAPEZOHEDRAL | • trapezohedral adj. Of, pertaining to, or resembling a trapezohedron. • TRAPEZOHEDRAL adj. having the shape of a trapezohedron. |
| TETARTOHEDRALLY | • TETARTOHEDRAL adv. having one fourth the number of planes required by complete symmetry. |