icosahedron
Americannoun
noun
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Etymology
Origin of icosahedron
1560–70; < Greek eikosáedron, equivalent to eikosa- (variant of eikosi-, combining form of eíkosi twenty) + -edron -hedron
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
See Examples For:
Continental Drift is Earth in miniature, mapped onto a truncated icosahedron — a soccer ball — with its regular patchwork of 12 pentagonal faces and 20 hexagonal faces.
From New York Times ● Jan. 1, 2023
There, he can sit and admire it along with the rest of a collection that includes work from real artists, such as the 80-inch infinity light icosahedron sculpture by L.A.’s Anthony James.
From Seattle Times ● Dec. 5, 2022
All boron-boron bonds within each icosahedron are identical and are approximately 176 pm in length.
From Textbooks ● Feb. 14, 2019
The maximum number of molecules that can be evenly assembled on the surface of an icosahedron is 60, but the number found in viruses is always much larger.
From Nature ● Dec. 11, 2018
These give the solid angles of the tetrahedron, the octahedron and the icosahedron.
From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6 "Geodesy" to "Geometry" by Various
In the most common form of boron, the icosahedra pack together in a manner similar to the cubic closest packing of spheres.
From Textbooks ● Feb. 14, 2019
The crystals consist of icosahedra, as shown in Figure 18.13, with a boron atom at each corner.
From Textbooks ● Feb. 14, 2019
In the different forms of boron, there are different arrangements and connections between the icosahedra.
From Textbooks ● Feb. 14, 2019
The smallest particles of fire are tetrahedra, of air octahedra, of water icosahedra.
From A Critical History of Greek Philosophy by Stace, W. T. (Walter Terence)
If any nation explodes a nuclear test in space, the orbiting icosahedrons should promptly report a violation of the test ban treaty.
From Time Magazine Archive
However, we may be wrong because "there are icosahedrons to every story."
From Time Magazine Archive
According to Plato earth was composed of cubes, fire of regular pyramids, air of regular octahedrons, water of regular icosahedrons.
From Timaeus by Jowett, Benjamin
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
