ragweed Definition
rag·weed (rag′wēd′)
noun
☆ any of a genus (Ambrosia) of chiefly North American plants of the composite family, having tassel-like, greenish flowers which yield large amounts of wind-borne pollen, a major cause of hay fever
Etymology: from the tattered appearance of the leaves
ragweed Usage Examples
Adjective modifier
- common: Last year, glyphosate-resistant common ragweed was confirmed in Missouri, which was also resistant to 10 times the normal rate of application.
- short: In Hawaii, short ragweed ( Ambrosia artemisiifolia L. ) is reported to be present in a number of locations.
Modifies a noun
- dermatitis: This would appear to be the manner in which Australian bush dermatitis, ragweed dermatitis, and parthenium dermatitis are all produced.
- pollen: I just found out a few days ago, that I'm very allergic to ragweed pollen.
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