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Definition of Ragweed
1. Noun. Widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity.
Exact synonyms: Benweed, Ragwort, Senecio Jacobaea, Tansy Ragwort
Group relationships: Genus Senecio, Senecio
Generic synonyms: Weed
Group relationships: Genus Senecio, Senecio
Generic synonyms: Weed
2. 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.
Exact synonyms: Ambrosia, Bitterweed
Group relationships: Genus Ambrosia
Specialized synonyms: Ambrosia Artemisiifolia, Common Ragweed, Ambrosia Trifida, Great Ragweed, Ambrosia Psilostachya, Perennial Ragweed, Western Ragweed
Generic synonyms: Weed
Group relationships: Genus Ambrosia
Specialized synonyms: Ambrosia Artemisiifolia, Common Ragweed, Ambrosia Trifida, Great Ragweed, Ambrosia Psilostachya, Perennial Ragweed, Western Ragweed
Generic synonyms: Weed
Definition of Ragweed
1. n. A common American composite weed (Ambrosia artemisiæfolia) with finely divided leaves; hogweed.
Definition of Ragweed
1. Noun. A plant of the genus ''Ambrosia''. These weeds are particularly noted for producing pollen which people with hay fever are allergic to. ¹
¹ Source: wiktionary.com
Definition of Ragweed
1. a weedy herb [n -S]
Medical Definition of Ragweed
1.