Small swirlprismatic hexacositrishecatonicosicupolidishecatonicosachoron

The  or sispaxthiccudy is a scaliform polychoron. It consists of 120 pentagonal antiprisms, 120 pentagrammic retroprisms, 120 pentagrammic prisms, 600 triangular prisms, and 240 pentagonal cupolae (falling into pairs in the same hyperplanes, forming 120 compounds of 2 each).

It can be created by diminishing the prismatodishecatonicosachoron, specifically by removing 240 vertices. As a result, every icosahedral cell of the prismatodishecatonicosachoron gets diminished down to a pentagonal antiprism, while every small stellated dodecahedral cell becomes a pentagrammic retroprism. Some of the pre-existing prismatic cells are lost.