# microtubule

> English word · Noun · frequency rank #65,309

## Definitions
1. A small tube made of protein and found in cells; part of the cytoskeleton.

## Etymology
From micro- + tubule.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/microtubule