Definitions for

**"Icosahedron"****Related Terms:**Octahedron, Dodecahedron, Regular polyhedron, Rhombohedron, Tetrahedron, Isosceles trapezoid, Equilateral triangle, Scalene triangle, Rhomboid, Rectangular prism, Rhombus, Regular polygon, Polyiamond, Kite , Quadrilateral, Regular hexagon, Decagon, Isosceles triangle, Rectangle, Hexagon, Heptagon, Equilateral, Isosceles, Square, Platonic solid, Parallelogram, Pentagon, Right triangle, N-gon, Hexagonal, Square, Right prism, Hypotenuse, Triangle, Nonagon, Trapezoid, Trigon, Cyclic quadrilateral, Leg, Pyramid, Congruent, Asymmetry, Scalene, Polyhedron, Bilateral symmetry, Tetragonal, Altitude of a triangle, Cotangent, Octagon, Alternate interior angles

A solid bounded by twenty sides or faces.

A basic structural system with 20 faces and 5 triangles around each of its 12 vertices.

A solid figure contained by 20 equal and equilateral triangles.

A regular geometric polyhedron with 20 equilateral trangular faces and 12 corners. This is a particularly stable structure. The capsid of many phages and viruses are icosahedral.

any polyhedron having twenty plane faces

a solid figure consisting of twenty triangular faces

a solid figure contained by twenty equal and equilateral triangles

a three dimensional shape composed of twenty faces, each of which is an equilateral triangle

(plural: icosahedra) A polyhedron consisting of twenty equilateral triangles which are grouped with 5 triangles around each vertex. Icosahedra are commonly used as a basis for geodesic dome designs because they are fairly round to begin with.

It is a name given to twenty sided polyhedron where all sides are equidimensional. Minerals such shaped belongs to isometric system. Plural: Icosahedra or Icosahedrons.

A twenty-sided figure, each side being a triangle. One of the " platonic primitives" Aladdin4D is capable of generating. Icosahedron

Twenty sided polyhedron; all sides are equidimensional. Minerals shaped as icosahedrons belong to the isometric system.

See regular polyhedron.

An icosahedron is a twenty-sided geometric solid.

(1) A 20 sided polyhedron. (2) The Platonic solid consisting of twenty equilateral triangles.

Geometric Structure with 20 Equilateral Triangular Faces ID Institute of Design Chicago IL USA IIT Illinois Institute of Technology " " "

[Etymology: 16th Century: from Greek eikosaedron, from eikosi twenty + -edron -hedron], "icosa'hedral adjective