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polygon

noun
🔊/ˈpɒlɪɡən/
🔊/ˈpɑːliɡɑːn/
 (geometry几何)
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  1. a flat shape with at least three straight sides and angles, and usually five or more多边形；多角形
    Topics Colours and Shapesc2
    Word Originlate 16th cent.: via late Latin from Greek polugōnon, neuter (used as a noun) of polugōnos ‘many-angled’.