Small diacositetracontatriacosihexacontaswirlprismatic hecatonicosatriacosihexacontachoron

The small diacositetracontatriacosihexacontaswirlprismatic hecatonicosatriacosihexacontachoron, abbreviated as the small 240-360 swirlprismatic 120-360choron or simply sidditsphit, is a nonconvex uniform polychoron. It is made out of 240 tetrahemihexahedra, 480 triangular prisms of two kinds, and 360 tetrahedra.

Along with the great diacositetracontatriacosihexacontaswirlprismatic hecatonicosatriacosihexacontachoron, it is one of the first two new uniform polychora to be discovered since 2006. It was found in September 2020 by _Geometer, a member of the Hi.gher Space forum.