Definitions

from The Century Dictionary.

  • noun In geometry, a polygon or plane figure with nine angles.

from the GNU version of the Collaborative International Dictionary of English.

  • noun (Geom.) A polygon or plane figure with nine sides and nine angles; a nonagon.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • noun geometry A polygon with nine sides; a nonagon.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

ennea- + -gon

Examples

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