butterbur Meaning, Definition & Usage
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noun small Eurasian herb having broad leaves and lilac-pink rayless flowers; found in moist areas
Petasites vulgaris; bog rhubarb; Petasites hybridus.
WordNet
But"ter*bur` noun
Definitions
(Bot.) A broad-leaved plant ( Petasites vulgaris ) of the Composite family, said to have been used in England for wrapping up pats of butter.