Tridiminished icosahedron
In geometry, the tridiminished icosahedron is one of the Johnson solids.
The name refers to one way of constructing it, by removing three pentagonal pyramids from a regular icosahedron, which replaces three sets of five triangular faces from the icosahedron with three mutually adjacent pentagonal faces.The tridiminished icosahedron is the vertex figure of the snub 24-cell, a uniform 4-polytope.
