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ragweed

Noun

rag=weed

WORDNET DICTIONARY

ragweed(n = noun.plant) benweed, ragwort, senecio jacobaea, tansy ragwort - widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity; Array

is a member of genus senecio, senecio

is a kind of weed

ragweed(n = noun.plant) ambrosia, bitterweed - any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma; Array

is a member of genus ambrosia

has particulars: ambrosia artemisiifolia, common ragweed, ambrosia trifida, great ragweed, ambrosia psilostachya, perennial ragweed, western ragweed

is a kind of weed

ragweed, n.

A common American composite weed (Ambrosia artemisiæfolia) with finely divided leaves; hogweed. [1913 Webster]

Great ragweed, a coarse American herb (Ambrosia trifida), with rough three-lobed opposite leaves.

ragweed, n.
1 = RAGWORT.
2 US any plant of the genus Ambrosia, with allergenic pollen.

For further exploring for "ragweed" in Webster Dictionary Online