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In geometry, the great dodecicosidodecahedron is a nonconvex uniform polyhedron, indexed as U61.
Related polyhedra
It shares its vertex arrangement with the truncated great dodecahedron and the uniform compounds of 6 or 12 pentagonal prisms. It additionally shares its edge arrangement with the nonconvex great rhombicosidodecahedron (having the triangular and pentagrammic faces in common), and with the great rhombidodecahedron (having the decagrammic faces in common).
References
Great dodecicosidodecahedron Wikipedia(Text) CC BY-SA