| DIHEDRA | • dihedra n. Plural of dihedron. • DIHEDRON n. a flattened double pyramid. |
| DIHEDRAL | • dihedral n. (Mathematics) An angle between two plane surfaces. • dihedral n. (Aeronautics) The upward slope of an aircraft’s wing. • dihedral n. (Chemistry) The angle between pairs of chemical bonds separated by a third bond. |
| DIHEDRON | • dihedron n. (Mathematics) A polyhedron having two faces. • DIHEDRON n. a flattened double pyramid. |
| TRIHEDRA | • trihedra n. Plural of trihedron. • TRIHEDRON n. a solid figure with three plane surfaces meeting at a point. |
| DIHEDRALS | • dihedrals n. Plural of dihedral. • DIHEDRAL n. the angle between two planes, also DIEDRAL. |
| DIHEDRONS | • dihedrons n. Plural of dihedron. • DIHEDRON n. a flattened double pyramid. |
| HEMIHEDRA | • hemihedra n. Plural of hemihedron. • HEMIHEDRON n. a solid derived in a hemihedral way, such as a tetrahedron. |
| HEMIHEDRY | • hemihedry n. The condition of being hemihedral. • HEMIHEDRY n. a property of crystals of being hemihedral. |
| TRIHEDRAL | • trihedral adj. (Geometry) Having three plane faces that meet at a common point. • TRIHEDRAL n. a solid having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. |
| TRIHEDRON | • trihedron n. (Mathematics) A geometric figure composed of three planes meeting at a single vertex. • TRIHEDRON n. a solid figure with three plane surfaces meeting at a point. |
| 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. |
| HEMIHEDRON | • hemihedron n. (Crystallography) A solid hemihedrally derived. • HEMIHEDRON n. a solid derived in a hemihedral way, such as a tetrahedron. |
| TRIHEDRALS | • TRIHEDRAL n. a solid having three sides or faces; thus, a trihedral angle is a solid angle bounded by three plane angles. |
| TRIHEDRONS | • trihedrons n. Plural of trihedron. • TRIHEDRON n. a solid figure with three plane surfaces meeting at a point. |
| HEMIHEDRIES | • HEMIHEDRY n. a property of crystals of being hemihedral. |
| HEMIHEDRISM | • hemihedrism n. (Crystallography) hemihedral crystallization. • HEMIHEDRISM n. a property of crystals of being hemihedral, or having half the number of symmetrically arranged planes occurring on a holohedron. |
| HEMIHEDRONS | • hemihedrons n. Plural of hemihedron. • HEMIHEDRON n. a solid derived in a hemihedral way, such as a tetrahedron. |
| HEMIHEDRISMS | • hemihedrisms n. Plural of hemihedrism. • HEMIHEDRISM n. a property of crystals of being hemihedral, or having half the number of symmetrically arranged planes occurring on a holohedron. |