Nonagon is the appropriate word for a nine sided plane figure
The word is, surprisingly, "nonagon".
nonagon is one good word
November
nonaligned?
Nonagonal.
nonagon nonahedron nonuplets
nonagon
Polygon, for many-sided.
nonagon
A nonagon has 9 sides. It come from a Latin word 'nonus' which means nine.
Nonagenerian - somebody that is 90 or between 90 and 100 years old. prefix for nonagon
nonagon