via Wikipedia infobox
thumb|3D model of a gyrobifastigium
In geometry, the gyrobifastigium is a polyhedron that is constructed by attaching a triangular prism to the square face of another one. It is an example of a Johnson solid. It is the only Johnson solid outside of the uniform polyhedra that can tile three-dimensional space.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).