CATHEDRALS | • cathedrals n. Plural of cathedral. • CATHEDRAL n. the principal church in a diocese, so called because in it the bishop has his official chair (cathedra). |
DECAHEDRAL | • decahedral adj. Having ten plane surfaces. • DECAHEDRAL adj. having ten sides. |
ENNEAHEDRA | • enneahedra n. Plural of enneahedron. • ENNEAHEDRON n. a nine-sided solid figure. |
HEMIHEDRAL | • hemihedral adj. (Of a crystal) Having only half the plane faces needed for the highest degree of symmetry in its system. • HEMIHEDRAL adj. of a crystal or crystal class, having half of the maximum number of faces or symmetry planes possible for a given crystal system. |
HEPTAHEDRA | • heptahedra n. Plural of heptahedron. • HEPTAHEDRON n. a solid figure having several plane faces. |
HEXAHEDRAL | • hexahedral adj. Having six plane surfaces. • HEXAHEDRAL adj. in the form of a hexahedron. |
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. |
ICOSAHEDRA | • icosahedra n. Plural of icosahedron. • ICOSAHEDRON n. a polyhedron having 20 faces. |
OCTAHEDRAL | • octahedral adj. Having eight plane surfaces; thus, in the shape or form of an octahedron. • octahedral adj. Of, or pertaining to octahedra. • OCTAHEDRAL adj. having eight faces or sides. |
PENTAHEDRA | • pentahedra n. Plural of pentahedron. • PENTAHEDRON n. a five-sided solid figure. |
POLYHEDRAL | • polyhedral adj. (Mathematics, geometry) Of, pertaining to or derived from a polyhedron. • polyhedral adj. (Geometry, of a solid or surface) Having multiple planar faces or facets. • polyhedral adj. (Aeronautics, of a fixed-wing aircraft) Having multiple dihedral angles along the wingspan. |
TETRAHEDRA | • tetrahedra n. Plural of tetrahedron. • TETRAHEDRON n. a polyhedron that has four faces. |
TRIHEDRALS | • TRIHEDRAL n. a solid having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. |