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Pronunciation of 

polygon

view main entry for polygonnoun [countable] math  /ˈpɑliˌɡɑn/ 
American English pronunciation: polygonClick to listen to the pronunciation of polygon

derived word

polygonal

  /pəˈlɪɡən(ə)l/  adjective
American English pronunciation: polygonalClick to listen to the pronunciation of polygonal

pre-roll

a video advertisement that appears immediately before an online video

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Open Dictionary

breakfast rave

a rave … that takes place early in the morning and where there is no alcohol or drugs …

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