| Type: | Uniform polyhedron |
| Faces: | 2 16 |
| Edges: | 32 |
| Vertices: | 16 |
| Wythoff: | |2 2 8/3 |
| Schläfli: | s |
| Symmetry: | D8d, [2<sup>+</sup>,16], (2*8), order 32 |
| Vertex Config: | 8/3.3.3.3 |
| Dual: | Octagrammic deltohedron |
| Properties: | nonconvex |
| Vertex Figure: | Octagrammic antiprism-3-8 vertfig.png |
In geometry, the octagrammic antiprism is one in an infinite set of nonconvex antiprisms formed by triangle sides and two regular star polygon caps, in this case two octagrams.