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dodecahedron Syllabification: do·dec·a·he·dron
Pronunciation: /ˌdōˌdekəˈhēdrən/

Definition of dodecahedron in English:

noun (plural dodecahedrons or dodecahedra-drə)

Image of dodecahedron
A three-dimensional shape having twelve plane faces, in particular a regular solid figure with twelve equal pentagonal faces.
Example sentences
  • There is a fifth Platonic regular solid too: the dodecahedron, which has pentagonal (five-sided) faces.
  • The fifth regular polyhedron, the dodecahedron, was left over, so Plato proposed rather lamely that the god used it up for decorating the universe.
  • Finally, so as not to leave out the one remaining regular solid, he proposed that the dodecahedron represented the shape of the entire universe.


Example sentences
  • Sphalerite is cubic with crystals commonly tetrahedral or dodecahedral and frequently complex and distorted.
  • Archaeologists have unearthed models of dodecahedra at several sites in Europe, including a dodecahedral model in Germany that had holes of different sizes puncturing its faces.
  • They described a distorted 5.5 x 4-cm dodecahedral crystal of genthelvite from a small pegmatite near Stove Mountain.


Late 16th century: from Greek dōdekaedron, neuter (used as a noun) of dōdekaedros 'twelve-faced'.

Words that rhyme with dodecahedron

decahedron, octahedron, polyhedron, tetrahedron
Definition of dodecahedron in:
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