noun
- plural of icosahedron; three-dimensional geometric shapes with twenty triangular faces
Usage: geometry; mathematics
Examples
- The students constructed paper models of icosahedra for their geometry project.
- Icosahedra are among the five Platonic solids studied in mathematics.
- The virus particles had the shape of icosahedra under the microscope.
- Ancient Greek mathematicians were fascinated by icosahedra and other regular polyhedra.
- The artist’s sculpture featured multiple icosahedra arranged in a complex pattern.
- In crystallography, some minerals naturally form icosahedra structures.