Platonic solid

noun

, Geometry.

1. one of the five regular polyhedrons: tetrahedron, octahedron, hexahedron, icosahedron, or dodecahedron.

Platonic solid

noun

1. any of the five possible regular polyhedra: cube, tetrahedron, octahedron, icosahedron, and dodecahedron Also called (esp formerly)Platonic body

Word History and Origins

Origin of Platonic solid¹

First recorded in 1950–55

Word History and Origins

Origin of Platonic solid¹

C17: named after Plato ¹, who was the first to list them