Illustration of horsetail
- 1 vegetative plant
- 2 fertile plant
horsetail
noun
horse·tail
ˈhȯrs-ˌtāl 
: any of a genus (Equisetum of the order Equisetales) of lower tracheophytes comprising perennial, spore-producing plants that spread by creeping rhizomes and have leaves reduced to nodal sheaths on the hollow jointed ribbed shoots
Examples of horsetail in a Sentence
Recent Examples on the Web
Cowgirl Courage, a nod to Jessie (Woody’s sister), is comprised of horsetail extract, juicy fruit, bright citrus, sandalwood and wildflowers.
—
Kaleigh Werner, Footwear News, 15 May 2026
Common ingredients Herbal ingredients are most commonly used in bladder control supplements to provide health support for overactive bladders, including buchu, cornsilk and horsetail.
—Bestreviews, Chicago Tribune, 11 Feb. 2026
Apple cider vinegar can also interact with certain dietary supplements, such as licorice, cassia cinnamon, and horsetail.
—Karen Berger, Verywell Health, 1 Oct. 2025
Key Ingredients: Marine collagen (derived from shark), iron, zinc, biotin, vitamin C, niacin, calcium, silica, horsetail extract
Type: Tablet
Size: 60 tablets
How to use: One tablet twice daily (after a meal) for three to six months.
—Kiana Murden, Vogue, 12 Sep. 2025
See All Example Sentences for horsetail
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Kaleigh Werner, Footwear News, 15 May 2026
Common ingredients Herbal ingredients are most commonly used in bladder control supplements to provide health support for overactive bladders, including buchu, cornsilk and horsetail.
—Bestreviews, Chicago Tribune, 11 Feb. 2026
Apple cider vinegar can also interact with certain dietary supplements, such as licorice, cassia cinnamon, and horsetail.
—Karen Berger, Verywell Health, 1 Oct. 2025
Key Ingredients: Marine collagen (derived from shark), iron, zinc, biotin, vitamin C, niacin, calcium, silica, horsetail extract
Type: Tablet
Size: 60 tablets
How to use: One tablet twice daily (after a meal) for three to six months.
—Kiana Murden, Vogue, 12 Sep. 2025
See All Example Sentences for horsetail
Cite this Entry
“Horsetail.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/horsetail. Accessed 20 May. 2026.
Copy CitationKids Definition
horsetail
noun
horse·tail
ˈhȯr-ˌstāl
: any of a genus of primitive plants that reproduce by spores instead of by flowers and seeds and have hollow stems and very small leaves resembling scales
called also equisetum, scouring rush
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