Hypertext Webster Gateway: "octagon"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Octagon \Oc"ta*gon\, n. [Gr. ? eight-cornered; ? (for ? eight) +
? an angle: cf.F. cctogone.]
1. (Geom.) A plane figure of eight sides and eight angles.
2. Any structure (as a fortification) or place with eight
sides or angles.
{Regular octagon}, one in which the sides are all equal, and
the angles also are all equal.
From WordNet (r) 1.7 (wn)
octagon
n : an eight-sided polygon
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