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

 

buttercup

 noun
noun
BrE BrE//ˈbʌtəkʌp//
 
; NAmE NAmE//ˈbʌtərkʌp//
 
Plants
 
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a wild plant with small shiny yellow flowers that are shaped like cups See related entries: Plants
See the Oxford Advanced American Dictionary entry: buttercup