tubulin

noun

tu·​bu·​lin ˈtü-byə-lən How to pronounce tubulin (audio)
ˈtyü-
: a globular protein that polymerizes to form microtubules

Examples of tubulin in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The drug binds to the protein tubulin in cells, preventing it from forming into microtubules, which are vital structural components of cells. Beth Mole, Ars Technica, 27 Oct. 2023 Along with another protein called tubulin, tau binds to these microtubules to keep them strong and stabilized. Amber Jorgenson, Discover Magazine, 17 Oct. 2019

Word History

Etymology

tubule + -in entry 1

First Known Use

1968, in the meaning defined above

Time Traveler
The first known use of tubulin was in 1968

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Cite this Entry

“Tubulin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/tubulin. Accessed 11 Sep. 2025.

Medical Definition

tubulin

noun
tu·​bu·​lin ˈt(y)ü-byə-lən How to pronounce tubulin (audio)
: a globular protein that polymerizes to form microtubules
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