ragweed
rag weed
- n widespread European weed having yellow daisylike flowers; sometimes an obnoxious weed and toxic to cattle if consumed in quantity
- 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
- When the frost was on the pumpkin and the ragweed menace died, the code was broken and checked against the record of patients' complaints.
- Ragweed and certain melons, such as honeydew and cantaloupe, for example, share a common allergy-provoking protein.
- In addition, ragweed churns out more pollen as CO2 levels rise.