Illustration of ragweed
: any of various chiefly North American weedy composite herbs (genus Ambrosia) that produce highly allergenic pollen
Examples of ragweed in a Sentence
Recent Examples on the Web
The list of allergens that SLIT can help fix is much smaller—at the moment, only short ragweed pollen, grasses, and house dust mites—and only one of these at a time.
—
Kathleen Felton, SELF, 10 June 2024
Tree and grass pollen levels will be very high on Tuesday, along with moderate levels of ragweed pollen.
—Hanh Truong, Sacramento Bee, 7 May 2024
Types of allergies: Nasal sprays can help with seasonal allergies to things like pollen, grass, or ragweed, perennial allergies to dust mites or pet dander, and non-allergic rhinitis.
—Shannon Ullman, Health, 6 May 2024
It’s followed by ragweed (a thin purple-stemmed, green flowering plant) in the fall, which is showing signs of worsening from higher amounts of carbon dioxide in the air.
—Michaela Mulligan, Miami Herald, 1 May 2024
See all Example Sentences for ragweed 
Kathleen Felton, SELF, 10 June 2024
Tree and grass pollen levels will be very high on Tuesday, along with moderate levels of ragweed pollen.
—Hanh Truong, Sacramento Bee, 7 May 2024
Types of allergies: Nasal sprays can help with seasonal allergies to things like pollen, grass, or ragweed, perennial allergies to dust mites or pet dander, and non-allergic rhinitis.
—Shannon Ullman, Health, 6 May 2024
It’s followed by ragweed (a thin purple-stemmed, green flowering plant) in the fall, which is showing signs of worsening from higher amounts of carbon dioxide in the air.
—Michaela Mulligan, Miami Herald, 1 May 2024
See all Example Sentences for ragweed
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“Ragweed.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ragweed. Accessed 14 Jul. 2024.
Copy CitationKids Definition
ragweed
noun
rag·weed
ˈrag-ˌwēd 
: any of various chiefly North American weedy herbs related to the daisies and producing pollen irritating to the eyes and noses of some persons
Medical Definition
ragweed
noun
rag·weed
ˈrag-ˌwēd
: any of various chiefly North American weedy herbaceous plants comprising the genus Ambrosia and producing highly allergenic pollen responsible for much hay fever and asthma: as
a
: an annual weed (A. artemisiifolia) with finely divided foliage that is common on open or cultivated ground in much of North America
b
: a coarse annual (A. trifida) with some or all of the leaves usually deeply and palmately 3-cleft or 5-cleft
called also great ragweed
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