motor unit

noun Cell Biology, Physiology.
a motor neuron and the muscle fibers innervated by its axon.

Origin:
1965–70

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American Heritage
Medical Dictionary

motor unit n.
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.
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Example sentences
Place the motor unit on the floor away from the bathtub so it cannot fall into the tub.
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