A stereohedron is a convex polyhedron that is isohedrally space-filling, meaning the symmetries of a tiling of copies of a stereohedron take any copy to any other copy.
The parallelohedra are stereohedra, as are the plesiohedra. Other stereohedra include the elongated gyrobifastigium, stereohedral elongated square dipyramid, equilateral gyrobifastigium, and ten-of-diamonds decahedron.
