Meanings
noun21-gon (plural 21-gons)
plural 21-gons
- geometrySynonym of icosihenagon: A polygon with twenty-one edges and twenty-one angles.
Synonyms: icosihenagon
Synonyms & antonyms
nounSynonym of icosihenagon: A polygon with twenty-one edges and twenty-one angles.
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Origin
Cite this entry
APA
21-gon. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/21-gon
MLA
“21-gon.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/21-gon. Accessed November 3, 2026.
Chicago
WatkinsX Dictionary, s.v. “21-gon,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/21-gon.
Source: 21-gon on Wiktionary, CC BY-SA 4.0.