πολύγωνος

ον, Subst., τό
A. polygonal, Id. Sens. 442b20, Plu. 2.1121c: Subst. πολύ‐γωνον, τό, polygon, Antipho Soph. 13, Gal. Anim.Pass. 2.3.
Liddell, Scott & Jones
A Greek-English Lexicon, 1940
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