nonagon

[ non-uh-gon, -guhn ]

noun

1. a polygon having nine angles and nine sides.

nonagon

/ nɒnˈæɡənəl; ˈnɒnəˌɡɒn /

noun

1. a polygon having nine sides Also calledenneagon

Derived Forms

• nonagonal, adjective

Other Words From

• non·ag·o·nal [non-, ag, -, uh, -nl], adjective

Word History and Origins

Origin of nonagon¹

1680–90; < Latin nōn ( us ) ninth + -a- (extracted from pentagon, hexagon, etc.) + -gon

Example Sentences

There is said to be only one triangle, only one nonagon, and only one of diamond shape in all the forty thousand.

From Project Gutenberg