/ ˈpɒlɪgən; NAmE ˈpɑːligɑːn/ noun
( geometry ) a flat shape with at least three straight sides and angles, and usually five or more
► pol·yg·on·al / pəˈlɪgənl; NAmE / adjective
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WORD ORIGIN
late 16th cent.: via late Latin from Greek polugōnon , neuter (used as a noun) of polugōnos many-angled.