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
Taking horsetail and apple cider vinegar may increase your risk for hypokalemia.
—
Kirstyn Hill, Pharmd, Mph, Health, 6 Jan. 2025
Horsetail Plant Extract As a nutraceutical (a plant product with medicinal benefits), horsetail may potentially benefit hair loss in people undergoing breast cancer treatment.15 Horsetail is also an ingredient in a hair-growth supplement called Viviscal.
—Kathi Valeii, Verywell Health, 24 Oct. 2024
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, 20 Sep. 2024
Certain supplements, like horsetail and licorice root, may also interact with senna by increasing the chances of low potassium levels.3
Some experts recommend taking senna supplements at least two hours before or after taking other oral medications.
—Cristina Mutchler, Health, 1 July 2024
See all Example Sentences for horsetail 
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Kirstyn Hill, Pharmd, Mph, Health, 6 Jan. 2025
Horsetail Plant Extract As a nutraceutical (a plant product with medicinal benefits), horsetail may potentially benefit hair loss in people undergoing breast cancer treatment.15 Horsetail is also an ingredient in a hair-growth supplement called Viviscal.
—Kathi Valeii, Verywell Health, 24 Oct. 2024
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, 20 Sep. 2024
Certain supplements, like horsetail and licorice root, may also interact with senna by increasing the chances of low potassium levels.3
Some experts recommend taking senna supplements at least two hours before or after taking other oral medications.
—Cristina Mutchler, Health, 1 July 2024
See all Example Sentences for horsetail
Dictionary Entries Near horsetail
Cite this Entry
“Horsetail.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/horsetail. Accessed 10 Feb. 2025.
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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