nonagon
noun /ˈnɒnəɡən/
  /ˈnɑːnəɡɑːn/
 (geometry)- a flat shape with nine straight sides and nine anglesTopics Colours and Shapesc2Word Originmid 17th cent.: formed irregularly from Latin nonus ‘ninth’, on the pattern of words such as hexagon.
| 单词 | nonagon | 
| 释义 | nonagonnoun /ˈnɒnəɡən/  /ˈnɑːnəɡɑːn/(geometry) 
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