Otherwise known as a tetrahedron, a "Caltrop", or to a lesser degree "Ol' Pointy". From Wordnik.com. [Wherein I am Unmasked] Reference
A classic 3D fractal is the Sierpinski tetrahedron, which is a tetrahedron of tetrahedra of tetrahedra, etc. From Wordnik.com. [MAKE Magazine] Reference
Above the tetrahedron is a balloon-shaped figure, apparently drawn into shape by the attraction of the tetrahedron. From Wordnik.com. [Occult Chemistry Clairvoyant Observations on the Chemical Elements] Reference
In our space, four equidistant points can be located, the vertices of a tetrahedron, that is, a pyramid having four triangular faces. From Wordnik.com. [The Fourth Dimension Simply Explained] Reference
A tetrahedron is a good model for e.g. a carbon atom in a molecular form, and the tighter the "packing," the tighter the molecular bonds. From Wordnik.com. [Making Light: The tastemakers of tomorrow] Reference
The oxygen sits near the barycenter of the tetrahedron. From Wordnik.com. [Quantum Hyperion] Reference
They tried the tetrahedron themselves and had to give it up. From Wordnik.com. [Analog Science Fiction and Fact]
The construction component of all silicates is the tetrahedron. From Wordnik.com. [Composition of rocks] Reference
CH3, NH2 and COOH, which are located at the corners of a tetrahedron. From Wordnik.com. [The Nobel Prize in Chemistry 2001 - Information for the Public] Reference
Mars 'orbit describe a tetrahedron; the sphere containing this will be. From Wordnik.com. [The Astronomy of Milton's 'Paradise Lost'] Reference
Here are a tetrahedron and a pyramid, each with edges of the same length. From Wordnik.com. [The Ghost from the Grand Banks]
Another excellent toy for exploring tetrahedron packing is or was Magnetix. From Wordnik.com. [Making Light: The tastemakers of tomorrow] Reference
When he turned his head he saw that the big red tetrahedron was base forward. From Wordnik.com. [Covergent Series]
Ruiz was left standing alone at the vertex of the tetrahedron of disaffection. From Wordnik.com. [A Case Of Conscience]
One of those Omegan coins, perhaps, or even a magic tetrahedron like Kenleth's. From Wordnik.com. [Analog Science Fiction and Fact]
He took the five-sided pyramid and stuck the four-sided tetrahedron on one face. From Wordnik.com. [The Ghost from the Grand Banks]
The "planet" was at the center of an aluminum tetrahedron, some two meters high. From Wordnik.com. [Analog Science Fiction and Fact]
Just fly over to the big, geometric tetrahedron and interact with other personas. From Wordnik.com. [6 broken promises about the future] Reference
Its head was a pyramid, a tetrahedron; its length vanished in the further darkness. From Wordnik.com. [The Metal Monster] Reference
She chews on everything and it's terribly attractive minus the tetrahedron we're stuck in. From Wordnik.com. [youneverwin Diary Entry] Reference
From the sides of the hollow square sprang long arms of spheres, each tipped by a tetrahedron. From Wordnik.com. [The Metal Monster] Reference
Fire has the form of a tetrahedron, air of an octahe - dron, water of an icosahedron, and earth of a cube. From Wordnik.com. [Dictionary of the History of Ideas] Reference
And what was the purpose of the dull red tetrahedron, seven feet on a side, which was set in the rear wall of the passenger section?. From Wordnik.com. [Covergent Series]
The best I can say for this thing is that it is still basically a tetrahedron; I mean, all the angles add up to 360 degrees, I guess. From Wordnik.com. [8/30/02 Tessa flew to Los] Reference
Fuel Point is a big patch of nothing in untenanted space within a tetrahedron of stars, the nearest of which is four light-years away. From Wordnik.com. [Passage at Arms]
They simply flashed in, went inert at the four corners of an imaginary tetrahedron, and threw everything they had -- and they had plenty. From Wordnik.com. [First Lensman]
Walter, his head resting against the padding of the console seat, watched Robinson silhouetted against the now vacant aluminum tetrahedron. From Wordnik.com. [Analog Science Fiction and Fact]
The better the tetrahedron, the more order it imparts in the system. From Wordnik.com. [PhysOrg.com - latest science and technology news stories] Reference
Inspiration: Created by a firefighter to be the "fire tetrahedron" of pizzas. From Wordnik.com. [Business Wire Travel News] Reference
Then any polyhedron has the same value for V − E + F as does a tetrahedron. From Wordnik.com. [Recently Uploaded Slideshows] Reference
Round Mars describe a tetrahedron; the circle including this will be Jupiter. From Wordnik.com. [The Martyrs of Science, or, The lives of Galileo, Tycho Brahe, and Kepler] Reference
The tetrahedron has four faces, four vertices, and six edges: 4 − 6 + 4 = 2. From Wordnik.com. [Recently Uploaded Slideshows] Reference
Why not see what materials you can use to make your own Sierpinski tetrahedron?. From Wordnik.com. [MAKE Magazine] Reference
The effect was as though one were looking down at the apex of a regular tetrahedron. From Wordnik.com. [Islands of Space] Reference
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