Definition of "icosahedral" [i•co•sa•he•dral]

• Of, relating to, or having the shape of an icosahedron (adjective)

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• "As the liquid alloys cool, islands form within them where the atoms are in what is called icosahedral order."
• "Researchers had previously been unable to determine the virus's structure because they had assumed that, like many other viruses, it's capsid had a design known as icosahedral symmetry."
• "The dimples are arranged in a "icosahedral" pattern."