20-3 gyrochoron

The 20-3 gyrochoron, also known as gyrus 20, is a convex isochoric polychoron and member of the gyrochoron family with 20 identical cells. It can also be constructed as the 20-7 gyrochoron.

Each cell of this polychoron has bilateral symmetry, with 2 mirror-symmetric dodecagons, 2 mirror-symmetric pentagons, 8 kites, and 2 isosceles triangles for faces.