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butterweed

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noun but·ter·weed \ ˈbə-tər-ˌwēd \

Definition of butterweed

:any of several plants having yellow flowers or smooth soft foliage: such as
a :horseweed 1
b :any of several North American senecios (such as Senecio glabellus)

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First Known Use of butterweed

1837

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