
thumb|upright|A Chestahedron, realized with 4 equilateral-triangle and 3 kite faces, all having the same area,
thumb|upright|A Chestahedron, realized with 4 equilateral-triangle and 3 kite faces, all having the same area,
A heptahedron (: heptahedra) is a polyhedron having seven sides, or faces.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).