witchweed

noun
witch·weed | \ˈwich-ˌwēd \

Definition of witchweed 

: any of a genus (Striga) of yellow-flowered Old World plants of the snapdragon family that are damaging root parasites of grasses (such as sorghum and corn) and that include one (S. asiatica) which is an introduced pest in parts of the southeastern U.S.

First Known Use of witchweed

1904, in the meaning defined above

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The first known use of witchweed was in 1904

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