regular tetrahedron

/ˌrɛg(jə)lər ˈtɛtrəˌhidrən/

Other forms: regular tetrahedra

Definitions of regular tetrahedron

1. noun

   a tetrahedron with four equilateral triangular 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