hair follicle

noun

: the tubular epithelial sheath that surrounds the lower part of the hair shaft and encloses at the bottom a vascular papilla supplying the growing basal part of the hair with nourishment see hair illustration

Examples of hair follicle in a Sentence

Recent Examples on the Web
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According to Salkey, these wavelengths of light can also widen blood vessels, allowing more nutrients and blood flow to the hair follicles. Rebecca Strong, USA Today, 16 Feb. 2026 Thinning Hair Hair grows more slowly as hair follicles start to shrink. Jocelyn Solis-Moreira, Flow Space, 13 Feb. 2026 Finally, hair follicle tests are extremely accurate and virtually impossible to tamper with since the sample is mailed to a professional lab. Bestreviews, Chicago Tribune, 10 Feb. 2026 Factors such as daily stress, hormones, and the relentless pace of modern life contribute to weaker hair strands, dormant hair follicles, and thinning hair. Tatiana Dias, Vogue, 9 Feb. 2026 See All Example Sentences for hair follicle

Word History

First Known Use

1838, in the meaning defined above

Time Traveler
The first known use of hair follicle was in 1838

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Cite this Entry

“Hair follicle.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hair%20follicle. Accessed 17 Feb. 2026.

Kids Definition

hair follicle

noun
: the tube-shaped sheath surrounding the lower part of a hair shaft

Medical Definition

hair follicle

noun
: the tubular epithelial sheath that surrounds the lower part of the hair shaft and encloses at the bottom a vascular papilla supplying the growing basal part of the hair with nourishment

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