noun
- An icosahedron with twenty equilateral triangles as faces. .
WordNet 3.0 © 2006 by Princeton University
| APA | WordNet. (2010). regular icosahedron. Retrieved September 21, 2026, from http://smartdefine.org/regular_icosahedron/definitions/1244902 |
| Chicago | WordNet. 2010. "regular icosahedron" http://smartdefine.org/regular_icosahedron/definitions/1244902 (accessed September 21, 2026). |
| Harvard | WordNet 2010, regular icosahedron, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/regular_icosahedron/definitions/1244902>. |
| MLA | WordNet. "regular icosahedron" 23 October 2010. Web. 21 September 2026. <http://smartdefine.org/regular_icosahedron/definitions/1244902> |