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bitterweed

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noun bit·ter·weed \ˈbi-tər-ˌwēd\

Definition of bitterweed

  1. :  any of several American plants containing a bitter substance: as a :  either of two ragweeds: (1) :  a low-growing common ragweed (Ambrosia artemissiifolia) (2) :  horseweed b :  an annual yellow-flowered sneezeweed (Helenium amarum syn. H. tenuifolium) c :  an erect annual composite herb (Hymenoxys odorata) of the southwestern United States that has yellow flowers and is poisonous to livestock




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