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TOEFL BNC: 17871 COCA: 26753

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’.

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