undecagonal
Having eleven sides and angles.
Adjective
- Having eleven sides and angles.
- Of or pertaining to an undecagon.
Origin
Etymology tree English undecagon Proto-Italic *-ālis Latin -ālisbor. Old French -albor. ▲ Latin -ālis Old French -elbor. ▲ Latin -ālisbor. Middle English -al English -al English undecagonal From undecagon + -al.