ragweed Meaning, Definition & Usage
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noun widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
ragwort; Senecio jacobaea; benweed; tansy ragwort.
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noun any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
ambrosia; bitterweed.
WordNet
Rag"weed noun
Definitions
(Bot.) A common American composite weed ( Ambrosia artemisiæfolia ) with finely divided leaves; hogweed.