regular tetrahedron

1. 1.

   a tetrahedron with four equilateral triangular faces

   Broaderregular polyhedron

Questions about regular tetrahedron

What does regular tetrahedron mean?

regular tetrahedron means "a tetrahedron with four equilateral triangular faces".

Is regular tetrahedron a common word?

regular tetrahedron is banded "Rare" — specialist or archaic — most readers will not have met it. The band comes from how often the word appears in a large corpus of everyday English, not from an editor's impression.