Definition of tubulin in English:

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Pronunciation: /ˈt(y)o͞obyələn/


A protein that is the main constituent of the microtubules of living cells.
Example sentences
  • In addition to actin, other filamentous systems in cells include tubulin, collagen, and DNA.
  • The basic structural subunit of microtubules is the protein tubulin.
  • We also detected increases in fragments of intracellular structural proteins: tubulin, actin, and myosin.


1960s: from tubule + -in1.

For editors and proofreaders

Syllabification: tu·bu·lin

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