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The Collaborative International Dictionary
Dodecahedron

Dodecahedron \Do*dec`a*he"dron\, n. [Gr. ?; ? twelve + ? seat, bottom, base: cf. F. dod['e]ca[`e]dre.] (Geom. & Crystallog.) A solid having twelve faces.

Note: The regular dodecahedron is bounded by twelve equal and regular pentagons; the pyritohedron (see Pyritohedron) is related to it; the rhombic dodecahedron is bounded by twelve equal rhombic faces. [1913 Webster] ||

Douglas Harper's Etymology Dictionary
dodecahedron

1560s, from Greek dodeka "twelve" (short for duodeka, from duo "two" + deka "ten;" compare dozen) + hedra "seat, base, chair, face of a geometric solid," from PIE root *sed- (1) "to sit" (see sedentary).

Wiktionary
dodecahedron

n. (context geometry English) A polyhedron with twelve faces; the regular dodecahedron has regular pentagons as faces and is one of the Platonic solids.

WordNet
dodecahedron

n. any polyhedron having twelve plane faces

Wikipedia

Usage examples of "dodecahedron".

The Sphere would willingly have continued his lessons by indoctrinating me in the conformation of all regular Solids, Cylinders, Cones, Pyramids, Pentahedrons, Hexahedrons, Dodecahedrons, and Spheres: but I ventured to interrupt him.

But if he'd sat down with the little plastic dodecahedrons a few times, he would have understood with his gut rather than just with his head the difference between a small probability and zero probability.

But if he'd sat down with the little plastic dodecahedrons a few times, he would have understood with his gut rather than just with his brain the difference between a small probability and zero probability.

And inside the,boundaries of the city were buildings shaped like hexagonal prisms, ditetragonal prisms, dodecahedrons, and hexoctahedrons-complex geometric shapes all, but each with its own purity arising from its simplicity.

Many of the branches carried shining spheres or cubes or dodecahedrons that dangled like geometric fruit, ranging from half a meter across to twice the length of a bottlenose dolphin.

Several pentagonal panels for the exterior of the dodecahedron were hanging from an elevated railroad track.

So that there were einkanters with single facets, and dreikanters with three facets fierkanters, funfkanters-all the way up to nearly perfect hexahedrons, octahedrons, dodecahedrons.

So that there were einkanters with single facets, and dreikanters with three facets— fierkanters, funfkanters—all the way up to nearly perfect hexahedrons, octahedrons, dodecahedrons.

The shells were apparently magnetically suspended -- at least the instructions included a powerful magnetic field generator,' and the space between the spherical shells and the dodecahedron was to be a high vacuum.

The shells were apparently magnetically suspended--at least the instructions included a powerful magnetic field generator,' and the space between the spherical shells and the dodecahedron was to be a high vacuum.

Nearly all of them were geometric solids of one sort or another: cubes, cones, dodecahedrons, oblate spheroids, three-, four-, and five-sided pyramids, each painted or coated in a bright primary color.

The dodecahedron was, to these ancient mathematicians, the most mysterious of the solids: it was by far the most difficult to construct, the accurate drawing of the regular pentagon necessitating a rather elaborate application of PYTHAGORAS' great theorem.

Jailani entered a new canal three-fourths of the way around the dodecahedron and left the rotary intersection behind, the noise abated.

That tiny explosion had not been visible but a second later the expanding Schwarzschild radius is eating its shell, swallowing thirty-six thousand tons of fragile dodecahedron, and growing quickly to gobble several thousand kilometers of space around it.

Just as Killashandra noted two men and a woman emerge from a panel in the far side of the dodecahedron, someone stamped in from the base entrance.