Word.ws English Dictionary

undecahedron

undecahedron noun: a polyhedron with eleven faces.

Noun

undecahedron (plural undecahedra or undecahedrons)

  1. A polyhedron with eleven faces.
    Synonyms:
    hendecahedron

Synonyms of undecahedron

Forms of undecahedron

pluralundecahedra
pluralundecahedrons

Origin of undecahedron

From undeca- + -hedron.

Questions about undecahedron

What does undecahedron mean?
Undecahedron means a polyhedron with eleven faces.
What part of speech is undecahedron?
Undecahedron is a noun.
What is the plural of undecahedron?
The plural of undecahedron is undecahedra.

Words near undecahedron in the dictionary

  1. undecaffeinated
  2. undecagon
  3. undecagonal
  4. undecagons
  5. undecahedra
  6. undecahedron
  7. undecahedrons
  8. undecaheme
  9. undecahydrate
  10. undecahydrates
  11. undecahydroxy

Source and license

Adapted from Wiktionary: undecahedron (page history and authors). Text available under the Creative Commons Attribution-ShareAlike 4.0 license. Word.ws reformatted the entry and added links. Wiktionary data of 2026-09-02.

Last updated:

Pronunciation audio from Wikimedia Commons, each file under its own free license: LL-Q1860 (eng)-Flame, not lame-undecahedron.wav.

Cite this entry: “undecahedron.” Word.ws, https://word.ws/undecahedron. Based on Wiktionary, CC BY-SA 4.0.