Transitional 1-bitridodecahedral swirlprism

The transitional 1-bitridodecahedral swirlprism is a convex isogonal polychoron, formed as a convex hull of three hexacosichora in a way that leaves eighteen corealmic vertices corresponding to a gyrocantellated triangular prism. It consists of 120 gyrocantellated triangular prisms, 120 triangular prisms, and 720 phyllic disphenoids of two kinds. 3 gyrocantellated triangular prisms, 1 triangular prism, 4 phylllic disphenoids join at each vertex.

It can be constructed as a subsymmetrical faceting of the rectified hecatonicosachoron.