Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun A polygon with nine sides and nine angles.

from The Century Dictionary.

  • noun A figure having nine sides and nine angles.

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

  • noun (Math.) A plane figure or polygon having nine sides and nine angles.

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

  • noun geometry A polygon with nine sides and nine angles.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • noun a nine-sided polygon

Etymologies

Sorry, no etymologies found.

Support

Help support Wordnik (and make this page ad-free) by adopting the word nonagon.

Examples

  • Euclid was able to draw an equilateral triangle, square, pentagon and hexagon, but recall that the heptagon (which has seven sides) and the nonagon (nine) eluded him.

    HERE’S LOOKING AT EUCLID Alex Bellos 2010

  • The octagon is constructable, but then the nonagon again is not.

    HERE’S LOOKING AT EUCLID Alex Bellos 2010

  • Euclid was able to draw an equilateral triangle, square, pentagon and hexagon, but recall that the heptagon (which has seven sides) and the nonagon (nine) eluded him.

    HERE’S LOOKING AT EUCLID Alex Bellos 2010

  • The octagon is constructable, but then the nonagon again is not.

    HERE’S LOOKING AT EUCLID Alex Bellos 2010

  • Euclid was able to draw an equilateral triangle, square, pentagon and hexagon, but recall that the heptagon (which has seven sides) and the nonagon (nine) eluded him.

    HERE’S LOOKING AT EUCLID Alex Bellos 2010

  • The octagon is constructable, but then the nonagon again is not.

    HERE’S LOOKING AT EUCLID Alex Bellos 2010

Comments

Log in or sign up to get involved in the conversation. It's quick and easy.