noun
- a polygon having nine angles and nine sides.
noun
- a polygon having nine sidesAlso called: enneagon
n.“plane figure with nine sides,” 1680s, a hybrid from Latin nonus “ninth” (see nones) + ending from pentagon, etc.
noun
noun
n.“plane figure with nine sides,” 1680s, a hybrid from Latin nonus “ninth” (see nones) + ending from pentagon, etc.