What does dodecahedra mean?
Dodecahedra is the plural of dodecahedron, a geometric solid composed of twelve regular pentagonal faces. Each dodecahedron has twenty vertices and thirty edges, with three pentagonal faces meeting at every vertex. It is one of the five Platonic solids, a group distinguished by faces that are congruent regular polygons and by identical arrangements around each vertex. The word is used especially in mathematics, geometry, architecture, and visual design, including the construction of paper models and the design of objects whose repeated faces create regular patterns. Its unusual form may sound less familiar than “dodecahedron,” but the plural is entirely standard. In nontechnical writing, “dodecahedra” can suggest precision, symmetry, and geometric complexity, whether the objects are mathematical models, architectural features, or elements of a design.
noun (plural)Dodecahedra is the plural form of dodecahedron, referring to geometric solids each with twelve pentagonal faces. A dodecahedron is one of the five Platonic solids, meaning all of its faces are congruent regular polygons and the same number of polygons meet at every vertex.
- Plural of dodecahedron: a geometric solid with twelve regular pentagonal faces, twenty vertices, and thirty edges.
"The model maker arranged the dodecahedra in a symmetrical display across the museum foyer."
"The students constructed dodecahedra from paper nets during the geometry lesson."
"The sculpture's cluster of dodecahedra became the centerpiece of the exhibition."
Dodecahedra is the standard plural of dodecahedron; the singular refers to one such solid.
"The exhibit presents a collection of intricate dodecahedra built from interlocking pieces."
A dodecahedron has 12 pentagonal faces, 20 vertices, and 30 edges—an astonishingly compact expression of perfect three-dimensional symmetry.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does dodecahedra come from?
The word comes from New Latin, which formed it from Greek elements meaning “twelve” and “seat” or “base.” The Greek dodeka is the source of the English prefix dodeca-, while the geometric ending relates to Greek hedra, “seat, base,” referring to the faces or bases of a solid. The same numerical root appears in related forms such as dodecagon and dodecagonal, and in the English word dozen.
Related word forms
How dodecahedra is actually used
The form is regularly used as a plural noun in mathematical and design contexts. It is more specialized than everyday geometric terms such as cube or sphere, but is common in discussions of polyhedra, architecture, games, and visual design.
Easily confused with dodecahedra
A dodecahedron is a three-dimensional solid with twelve pentagonal faces, whereas a dodecagon is a two-dimensional polygon with twelve sides.