regular icosahedron

1. 1.

   an icosahedron with twenty equilateral triangles as faces

   Broaderregular polyhedron

Questions about regular icosahedron

What does regular icosahedron mean?

regular icosahedron means "an icosahedron with twenty equilateral triangles as faces".

Is regular icosahedron a common word?

regular icosahedron 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.