ragweed
Nouns
- (n) widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity benweed, ragwort, Senecio jacobaea, tansy ragwort,
- (n) 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,