Word.ws English Dictionary

Plural of polyhedron

irregular plural

The plural of polyhedron is polyhedra or polyhedrons.

Forms of polyhedron

Singularpolyhedron /ˌpɒlɪˈhiːdɹən/
Pluralpolyhedra /pɒl.iˈhiː.dɹə/
polyhedrons
Countablecountable

Polyhedra and polyhedrons in a sentence

  • Of the convex polyhedra with regular faces, the only ones that have tetrahedral, octahedral, or icosahedral symmetry are the Platonic and Archimedean solids.1966, Norman W. Johnson, “Convex Polyhedra with Regular Faces”, in Canadian Journal of Mathematics, volume XVIII, number I, Toronto...
  • There are elegant theorems and deep connections with polytopes, polyhedra, combinatorics, commutative algebra, symplectic geometry, and topology.2024, David A. Cox, John B. Little, Henry K. Schenck, Toric Varieties, American Mathematical Society, →ISBN. From the entry toric
  • The regular polyhedra include the five Platonic solids and the four Kepler-Poinsot solids.2012, Jonathan Bowers, Uniform Polyhedra and Other Three Dimensional Shapes. From the entry verf
  • There are two quasiregular polyhedra not having identical regular faces: the cuboctahedron (dymaxion) and the icosidodecahedron.1996, Wolfgang Schueller, The Design of Building Structures, page 540. From the entry quasiregular
  • There are just two polyhedra that will fulfill these conditions: the cuboctahedron and the icosidodecahedron (Diagram 3.3).1976, Hugh Kenner, Geodesic Math and how to Use it, page 21. From the entry cuboctahedron

Meaning of polyhedron

  1. noun A solid figure with many flat faces and straight edges.
  2. noun A polyscope, or multiplying glass.
  3. noun A stage in the growth of Hydrodictyon, when the resting spore breaks up into several megazoospores that put out horn-like appendages; these polyhedra break up into zoospores.

Full definition of polyhedron

Nouns ending in -on: plural -a

Questions about the plural of polyhedron

What is the plural of polyhedron?
The plural of polyhedron is polyhedra or polyhedrons.
Which is correct, polyhedra or polyhedrons?
Both are used. polyhedra is the more common of the two in English writing.
Is polyhedron countable?
Polyhedron is a countable noun.

Source and license

Adapted from Wiktionary: polyhedron (page history and authors) and the entries of its forms. Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws left out forms marked obsolete, archaic, rare or dialectal and added the examples. Wiktionary data of 2026-09-02.

Last updated:

Cite this page: “Plural of polyhedron.” Word.ws, https://word.ws/plural/polyhedron. Based on Wiktionary, CC BY-SA 4.0.