Word.ws English Dictionary

eicosaedrum

eicosaedrum is the obsolete form of icosahedron.

Meaning of icosahedron

Noun

icosahedron (plural icosahedra or icosahedrons)

  1. A polyhedron with twenty faces.
  2. (specifically) A regular icosahedron: one of the Platonic solids, all of whose faces are regular (equilateral) triangles
    Synonyms:
    regular gyroelongated pentagonal bipyramid

Origin of eicosaedrum

From εἴκοσι (eíkosi) (twenty) + ἕδρα (hédra) (seat, base).

Questions about eicosaedrum

What is eicosaedrum the obsolete form of?
Eicosaedrum is the obsolete form of icosahedron.

Words near eicosaedrum in the dictionary

  1. eicosadiene
  2. eicosadienes
  3. eicosadienoic
  4. eicosadienoic acid
  5. eicosadienoyl
  6. eicosaedrum
  7. eicosaenoic
  8. eicosaenoic acid
  9. eicosahedral
  10. eicosamer
  11. eicosameric

Source and license

Adapted from Wiktionary: eicosaedrum (page history and authors); icosahedron (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:

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