dynein definition
Definition of DYNEIN. : an ATPase that is associated especially with microtubules involved in the movement of cellular organelles and structures (as cilia, flagella, and chromosomes).ADVERTISEMENT. dyne (force) + -in.First Known Use: 1965. an ATPase that cross-links adjacent microtubules and that by controlling their relative sliding motion regulates the movement of cellular organelles and structures (as the beating of cilia and flagella and the movement of chromosomes to the poles of the spindle).