endecagon

from The Collaborative International Dictionary of English v.0.48
Hendecagon \Hen*dec"a*gon\, n. [Gr. ? eleven + ? angle: cf. F.
   hend['e]cagone.] (Geom.)
   A plane figure of eleven sides and eleven angles. [Written
   also {endecagon}.]
   [1913 Webster]
from The Collaborative International Dictionary of English v.0.48
Endecagon \En*dec"a*gon\, n. [See {Hendecagon}.] (Geom.)
   A plane figure of eleven sides and angles.
   [1913 Webster]
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