1. icosahedron love

Definitions

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A polyhedron having 20 faces.

Century Dictionary and Cyclopedia

1. n. A solid bounded by twenty planes. In the ordinary regular icosahedron the faces are equal equilateral triangles, equally inclined each to those adjacent to it. It has 12 vertices and 30 edges, 3 edges per face, 5 edges per vertex.

Wiktionary

1. n. geometry A polyhedron with twenty faces.
2. n. geometry, specifically A regular icosahedron: one of the Platonic solids, all of whose faces are regular triangles

GNU Webster's 1913

1. n. (Geom.) A solid bounded by twenty sides or faces.

WordNet 3.0

1. n. any polyhedron having twenty plane faces

Etymologies

1. From Ancient Greek εἰκοσάεδρον, from εἴκοσι ("twenty") + ἕδρα (hedra, "face of a geometrical solid"). (Wiktionary)
2. Greek eikosaedron : eikosi, twenty; + -edron, -hedron. (American Heritage® Dictionary of the English Language, Fourth Edition)

Examples

• “The icosahedron is another of the five regular, or Platonic, bodies having all their sides, angles, and planes similar and equal.”

Amusements in Mathematics

• “Then, about 10 years ago, the mathematician Reidun Twarock developed a more general theory of the geometry of viruses based on the symmetries of the icosahedron, but using shapes in six dimensions, not three.”

The Wall Street Journal: New Angles on Biology

• “I've rolled the icosahedron and painted a few miniatures myself so it only raises my charisma to be accepted by that culture.”

Archive 2009-08-01

• “The company receives more than 1 million applications a year and identifies the top candidates through a rigorous screening process that analyzes SAT scores, grade-point averages and their performance on tests with such questions as: "How many different ways can you color an icosahedron with one of three colors on each face?”

The Huffington Post: Google Hiring More Than 6,200 Workers This Year

• “Join five equilateral triangles together and you have the first part of an icosahedron C.”

Simon & Schuster: HERE’S LOOKING AT EUCLID

• “Only five shapes fit the bill: the tetrahedron, the cube, the octahedron, the icosahedron and the dodecahedron, the quintet known as the Platonic solids since Plato wrote about them in the Timaeus.”

Simon & Schuster: HERE’S LOOKING AT EUCLID

• “The octahedron can be made from four cards and an icosahedron with ten of them.”

Simon & Schuster: HERE’S LOOKING AT EUCLID

• “The tetrahedron was fire, the cube earth, the octahedron air, the icosahedron water and the dodecahedron the encompassing dome.”

Simon & Schuster: HERE’S LOOKING AT EUCLID

• “This set of five polyhedra came with the faces already numbered, to make it easy to see that there were 12 sides on a dodacahedron, or 20 on an icosahedron, which made them easy to use as dice.”

The Braunstein Game « Isegoria

• “George Hart has nice pictures including an icosahedron as well.”

The Dodecahedra

Show 10 more examples...

Lists

These user-created lists contain the word ‘icosahedron’.