regular icosahedron

/ˌrɛg(jə)lər aɪˌˈkoʊsəˌˈhidrən/

Other forms: regular icosahedrons

Definitions of regular icosahedron

1. noun

   an icosahedron with twenty equilateral triangles as faces
   type of:

   Platonic body, Platonic solid, ideal solid, regular convex polyhedron, regular convex solid, regular polyhedron

   any one of five solids whose faces are congruent regular polygons and whose polyhedral angles are all congruent