Small dodecahemidodecahedron

The small dodecahemidodecahedron, or sidhid, is a quasiregular polyhedron and one of 10 uniform hemipolyhedra. It consists of 12 pentagons and 6 "hemi" decagons, with two of each joining at a vertex. Its pentagonal faces, as well as its hemi decagonal faces, are parallel to those of a dodecahedron: hence the name "dodecahemidodecahedron". The "small" suffix, used for stellations in general, distinguishes it from the great dodecahemidodecahedron, which also has this face arrangement.

It is a faceting of the icosidodecahedron, keeping the original's pentagons, while also using its equatorial decagons.