ragweed

Meanings

Plural: ragweeds

Noun

• widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
• any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma
• A plant of the genus Ambrosia. These weeds are particularly noted for producing pollen which people with hay fever are allergic to.
• The plant Bassia scoparia.

Synonyms

ambrosia, benweed, bitterweed, ragwort, Senecio jacobaea, tansy ragwort