'Undecagon' definitions:
Definition of '
undecagon
'
From:
WordNet
noun
An eleven-sided polygon
Definition of '
Undecagon
'
From:
GCIDE
Undecagon \Un*dec"a*gon\, n. [L. undecim eleven + Gr. ? an angle.] (Geom.) A figure having eleven angles and eleven sides. [1913 Webster]
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