In geometry, the diminished rhombicosidodecahedron is one of the Johnson solids (J_76). It can be constructed as a rhombicosidodecahedron with one pentagonal cupola removed. Related Johnson solids are: J_80: parabidiminished rhombicosidodecahedron with two opposing cupolae removed, and J_81: metabidiminished rhombicosidodecahedron with two non-opposing cupolae removed, and J_83: tridiminished rhombicosidodecahedron with three cupola removed.