| DECAHEDRON | • decahedron n. A polyhedron with ten faces. • DECAHEDRON n. a solid figure or body inclosed by ten plane surfaces. | 
| HEXAHEDRON | • hexahedron n. (Geometry) A polyhedron with six faces. The regular hexahedron is the cube, and is one of the Platonic solids. • HEXAHEDRON n. a solid body of six sides or faces. | 
| OCTAHEDRON | • octahedron n. (Geometry) a polyhedron with eight faces; the regular octahedron has regular triangles as faces and… • OCTAHEDRON n. (Greek) a solid bounded by eight plane faces, also OCTOHEDRON. | 
| ENNEAHEDRON | • enneahedron n. (Geometry) A polyhedron with nine faces. • ENNEAHEDRON n. a nine-sided solid figure. | 
| HEPTAHEDRON | • heptahedron n. (Mathematics) any polyhedron having seven faces. • HEPTAHEDRON n. a solid figure having several plane faces. | 
| ICOSAHEDRON | • icosahedron n. (Geometry) A polyhedron with twenty faces. • icosahedron n. (Geometry, specifically) A regular icosahedron: one of the Platonic solids, all of whose faces are regular… • ICOSAHEDRON n. a polyhedron having 20 faces. | 
| PENTAHEDRON | • pentahedron n. A solid geometric figure with five faces. • PENTAHEDRON n. a five-sided solid figure. | 
| TETRAHEDRON | • tetrahedron n. (Geometry) A polyhedron with four faces; the regular tetrahedron, the faces of which are equal equilateral… • TETRAHEDRON n. a polyhedron that has four faces. | 
| CHILIAHEDRON | • chiliahedron n. (Geometry) A polyhedron bounded by one thousand plane surfaces. • CHILIAHEDRON n. (Greek) a one-thousand sided solid figure. | 
| DODECAHEDRON | • dodecahedron n. (Geometry) A polyhedron with twelve faces; the regular dodecahedron has regular pentagons as faces and… • DODECAHEDRON n. (Greek) a twelve-sided solid figure. | 
| HENDECAHEDRON | • hendecahedron n. (Geometry) A solid having eleven plane faces. • HENDECAHEDRON n. a solid figure having 11 plane faces. | 
| TRISOCTAHEDRON | • trisoctahedron n. (Crystallography) A solid of the isometric system bounded by 24 equal faces, three corresponding to… • TRISOCTAHEDRON n. a solid figure having 24 congruent faces and an octahedron as a base. |