undecagon
noun
un·dec·a·gon
ˌənˈdekəˌgän
plural -s
: a plane figure having eleven angles and eleven sides
Word History
Etymology
undec- + -agon (as in decagon)
- unimaginative
- unimaginatively
- unimaginativeness
- unimagined
- Unimak
- unimanual
- unimitable
- unimmunised
- unimmunized
- unimodal
- unimodality
- unimodular
- unimolecular
- unimpaired
- unimpassioned
- unimpassionedly
- unimpeachability
- unimpeachable
- unimpeachably
- unimpeached
- unimpeded
- unimplemented
- unimportance
- unimportances
- unimportant