motor unit

noun Cell Biology, Physiology.

a motor neuron and the muscle fibers innervated by its axon.

Origin of motor unit

First recorded in 1965–70 Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for motor unit

  • The upshot of it was that somebody reported him, and the officer in command of his "motor-unit" read him a stern lecture.

    Jimmie Higgins|Upton Sinclair
  • He wrote a letter to the officer in command of his motor-unit, telling what had happened to him, and couldn't it be arranged?

    Jimmie Higgins|Upton Sinclair

Medicine definitions for motor unit

motor unit


A single somatic motor neuron and the group of muscle fibers innervated by it.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.