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

 

ragwort

 noun
noun
BrE BrE//ˈræɡwɜːt//
 
; NAmE NAmE//ˈræɡwɜːrt//
 
[uncountable]
 
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a wild plant with yellow flowers, poisonous to cows and horses
See the Oxford Advanced American Dictionary entry: ragwort