Medial biomnisnub decachoron

The medial biomnisnub decachoron or mebosid is a convex isogonal polychoron that consists of 10 snub tetrahedra, 40 triangular antiprisms of two kinds, 30 tetragonal disphenoids, 120 phyllic disphenoids of two kinds, and 360 irregular tetrahedra of three kinds. 1 snub tetrahedron, 2 triangular gyroprism, 1 tetragonal disphenoid, 4 phyllic disphenoids, and 12 irregular tetrahedra join at each vertex. It is one of a total of 8 polychora that can be obtained as the convex hlul of 2 opposite snub pentachora.

This polychoron resembles the great biomnisnub decachoron in every way except for the vertex figure's topology, in which the medial version's 5-valence vertex is not adjacent to the 6- and 8-valence vertices, unlike the great biomnisnub decachoron.