Triakis octahedron

The Triakis octahedron is a convex polyhedron that can be classified as a type of Archimedean solid. It is derived from the regular octahedron by adding a pyramid to each face of the octahedron, where each pyramid has a triangular base. This construction results in a solid that retains the overall symmetry of the octahedron but has additional vertices, edges, and faces.