In geometry, the octagrammic prism is one of an infinite set of nonconvex prisms formed by square sides and two regular star polygon caps, in this case two octagrams.
| Octagrammic prism | |
|---|---|
 | |
| Type | Uniform polyhedron |
| Faces | 2 octagrams 8 squares |
| Edges | 24 |
| Vertices | 16 |
| Vertex configuration | 8/3.4.4 |
| Wythoff symbol | 2 8/3 | 2 |
| Schläfli symbol | s{2,16/3} sr{2,8/3} |
| Coxeter diagram |        |
| Symmetry group | D8h |
| Dual polyhedron | octagrammic bipyramid |
| Properties | nonconvex |
| Vertex figure | |
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