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octadecagon

octadecagon noun: a polygon with 18 sides and 18 vertices.

Noun

octadecagon (plural octadecagons)

  1. (rare) A polygon with 18 sides and 18 vertices.
    • A regular octadecagon cannot be constructed using a compass and straightedge.
    Synonyms:
    18-gon

octadecagon meaning in Thai

octadecagon in Thai

geometry
รูปสิบแปดเหลี่ยม

Synonyms of octadecagon

Forms of octadecagon

pluraloctadecagons

Origin of octadecagon

From octadeca- + -gon.

Questions about octadecagon

What does octadecagon mean?
Octadecagon means a polygon with 18 sides and 18 vertices.
What is octadecagon in Thai?
Octadecagon in Thai is รูปสิบแปดเหลี่ยม. See Octadecagon meaning in Thai.
What part of speech is octadecagon?
Octadecagon is a noun.
What is the plural of octadecagon?
The plural of octadecagon is octadecagons.

Words near octadecagon in the dictionary

  1. octadecadienoates
  2. octadecadienoic
  3. octadecadienoic acid
  4. octadecadienoyl
  5. octadecafluorooctane
  6. octadecagon
  7. octadecagons
  8. octadecahedra
  9. octadecahedral
  10. octadecahedron
  11. octadecahedrons

Source and license

Adapted from Wiktionary: octadecagon (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-octadecagon.wav.

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