brush border

noun

: a stria of microvilli on the plasma membrane of an epithelial cell (as in a kidney tubule) that is specialized for absorption

Word History

First Known Use

1903, in the meaning defined above

Time Traveler
The first known use of brush border was in 1903

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Cite this Entry

“Brush border.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/brush%20border. Accessed 6 Jun. 2026.

Medical Definition

brush border

noun
: a stria of microvilli on the plasma membrane of an epithelial cell (as in a kidney tubule) that is specialized for absorption

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