In 4-dimensional geometry, the dodecahedral bipyramid is the direct sum of a dodecahedron and a segment, {5,3} + { }.

Each face of a central dodecahedron is attached with two pentagonal pyramids, creating 24 pentagonal pyramidal cells, 72 isosceles triangular faces, 70 edges, and 22 vertices.

A dodecahedral bipyramid can be seen as two dodecahedral pyramids augmented together at their base.

It is the dual of a icosahedral prism.

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