dodecahedron

[ doh-dek-uh-hee-druhn, doh-dek- ]

noun

, Geometry, Crystallography.

, plural do·dec·a·he·drons, do·dec·a·he·dra [doh-dek-, uh, -, hee, -dr, uh, doh-dek-].

1. a solid figure having 12 faces.

dodecahedron

/ ˌdəʊdɛkəˈhiːdrən /

noun

1. a solid figure having twelve plane faces. A regular dodecahedron has regular pentagons as faces See also polyhedron

dodecahedron

/ dō′dĕk-ə-hē′drən /

, Plural dodecahedrons

1. A polyhedron having twelve faces.

Derived Forms

• ˌdodecaˈhedral, adjective

Other Words From

• do·deca·hedral adjective

Word History and Origins

Origin of dodecahedron¹

First recorded in 1560–70; dodeca- + -hedron

Example Sentences

Here’s one shown on the net of the dodecahedron, hiding in plain sight.

From Quanta Magazine

Mathematicians proved this five years ago, but the dodecahedron wasn’t on their list.

From Quanta Magazine

In fact, they found infinitely many straight paths on the surface of the dodecahedron that start and end on the same vertex without passing through any others.

From Quanta Magazine

By adapting Finster’s algorithm, the researchers were able to identify all the straight paths on the dodecahedron from a corner to itself, and to classify these paths via the dodecahedron’s hidden symmetries.

From Quanta Magazine

The Dodecahedron, having twelve regular pentagons (or five-sided figures) as faces.

From Project Gutenberg

The rhombic dodecahedron is not regular, for though the lines and surfaces are equal, the angles are not.

From Project Gutenberg

Two of these generate the cube and the octahedron; five of these generate the dodecahedron and the icosahedron.

From Project Gutenberg

The “rhombic dodecahedron,” one of the geometrical semiregular solids, is an important crystal form.

From Project Gutenberg

The “ordinary dodecahedron” is one of the Platonic solids (see Polyhedron).

From Project Gutenberg