In geometry, a enneahedron (or nonahedron) is a polyhedron with 9 faces. There are 2606 topologically distinct enneahedra and none are regular, so this name is ambiguous. ==Examples== The most familiar enneahedra are the octagonal pyramid and the heptagonal prism. The heptagonal prism is a uniform polyhedron, with two regular heptagon faces and se...
a solid figure having nine faces
a solid figure having nine faces.