icosahedron

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icosahedron

/(ˌ)aɪˌkoʊsəˈhiːdɹən/
/(ˌ)aɪˌkɒsəˈhiːdɹən/
/(ˌ)aɪˌkɔsəˈhiːdɹən/

Where it comes from

From Ancient Greek εἰκοσάεδρον (eikosáedron), from εἴκοσι (eíkosi, “twenty”) + ἕδρα (hédra, “face of a geometrical solid”). Equivalent to icosa- + -hedron.

noun icosahedra · icosahedrons · eicosaedrum · icosaedrum

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

Translations

Every language

noun a polyhedron

Español	icosaedro
한국어	이십면체 isimmyeonche
日本語	二十面体 nijūmentai
Português	icosaedro
Français	icosaèdre
Deutsch	Ikosaeder, Zwanzigflächner, 20-Flächner
Ελληνικά	εικοσάεδρο eikosáedro
Русский	икоса́эдр ikosáedr, двадцатигра́нник dvadcatigránnik
Tiếng Việt	nhị thập diện

noun regular icosahedron

한국어	정이십면체 jeong'isimmyeonche
日本語	正二十面体 seinijūmentai

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MLA

"icosahedron." Wiktionary, via Micwyn, micwyn.com/word/icosahedron. Accessed 6 Nov. 2026.

APA

icosahedron. (n.d.). In Wiktionary, via Micwyn. Retrieved November 6, 2026, from https://micwyn.com/word/icosahedron

Chicago

"icosahedron." Wiktionary, via Micwyn. Accessed November 6, 2026. https://micwyn.com/word/icosahedron.

BibTeX

@misc{icosahedron_2026,
  title = {icosahedron},
  howpublished = {Wiktionary, via Micwyn},
  year = {2026},
  url = {https://micwyn.com/word/icosahedron},
  urldate = {2026-11-06}
}