hebesphenomegacorona

== English == === Etymology === From hebe- +‎ spheno- +‎ mega- +‎ corona. Compare sphenocorona, sphenomegacorona. Coined by Norman W. Johnson in 1969. === Noun === hebesphenomegacorona (mathematics) A polyhedron, one of the Johnson solids, having 18 triangular and 3 square faces. === Further reading === hebesphenomegacorona on Wikipedia.Wikipedia