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Definition of ragweed noun from the Oxford Advanced Learner's Dictionary

ragweed

noun
 
/ˈræɡwiːd/
 
/ˈræɡwiːd/
[uncountable]
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  1. a North American plant with small green flowers that contain a lot of pollen, which causes hay fever in some people
See ragweed in the Oxford Advanced American Dictionary
yellow
noun
 
 
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