Definition of ragweed in English:

ragweed

Line breaks: rag|weed
Pronunciation: /ˈragwiːd
 
/

noun

[mass noun]
  • A North American plant of the daisy family. Its tiny green flowers produce copious amounts of pollen, making it a major causative agent of hay fever in some areas.
    • Ambrosia artemisia, family Compositae
    More example sentences
    • Many early emerging summer annuals, including giant ragweed, kochia, crabgrass, lambsquarters, and Russian thistle, are removed during tillage, allowing the crop and any new weeds to emerge together.
    • It is wind-born pollen from plants that have inconspicuous flowers like wild grasses or ragweed that are the major causes of respiratory allergy.
    • Occasionally, broadleaf weeds, such as Canada thistle or ragweed, become established in winter wheat fields and interfere with grain harvest or with the following soybean crop.

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