hexacosichoron
A four-dimensional object analogous to an icosahedron, constructed out of six hundred tetrahedra, arranged 20 to a vertex.
Fig. 5 shows a polar representation of 5880 rotations generated by subsampling the hexacosichoron.
Where it comes from
From hexacosi- (“six hundred”) + -choron (“room”), from Ancient Greek ἑξακόσιοι (hexakósioi, “six hundred”) and χῶρος (khôros, “room”).
Adapted from the Wiktionary entry hexacosichoron (CC BY-SA 4.0).