WordNet 3.0 Copyright © 2006 by Princeton University.
- 1. ragwort, tansy ragwort, ragweed, benweed, Senecio jacobaea, weed
- usage: widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
- 2. ragweed, ambrosia, bitterweed, weed
- usage: any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
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See also: ragweed (Dictionary)