1. of, relating to, or having the shape of an icosahedron (a polyhedron with 20 triangular faces)
Usage: technical; geometry

Examples

• The virus has an icosahedral structure composed of 20 identical triangular faces.
• In chemistry, icosahedral symmetry is common in certain molecular clusters.
• The crystal displayed icosahedral geometry under the microscope.
• Many viruses, including some bacteriophages, adopt an icosahedral shape for structural stability.
• The mathematician studied the properties of icosahedral polyhedra.