Definition

1. Adjective:
   • Having the form or symmetry of an icosahedron: Describes a shape or structure that is, or resembles, a polyhedron with twenty faces.
   • Relating to or characterized by an icosahedron: Pertaining to the geometric properties, symmetry, or arrangement associated with an icosahedron.

Examples of Usage

• Adjective:
  • Many viruses, such as the adenovirus, have an icosahedral capsid.
  • The geodesic dome designed by Buckminster Fuller is based on an icosahedral framework.
  • In geometry, an icosahedral shape has 20 equilateral triangular faces.

Advanced Usage

• "Icosahedral symmetry": A high degree of rotational symmetry (specifically, 60-fold) characteristic of a regular icosahedron, often discussed in geometry, crystallography, and virology.
  • The molecule exhibits perfect icosahedral symmetry, which contributes to its stability.

Variants and Related Words

• Icosahedron (noun): A solid geometric figure with twenty plane faces, especially with equilateral triangular faces.
  • A regular icosahedron is one of the five Platonic solids.

Synonyms

• Twenty-faced: (Descriptive) Having twenty faces.
• Polyhedral: (Broader category) Having multiple plane faces.

Adjective

1. of or relating to an icosahedron