Pronunciation: (in"tur-noor'on, -nyoor'-), [key]
—n. Cell Biol.
any neuron having its cell body, axon, and dendrites entirely within the central nervous system, especially one that conveys impulses between a motor neuron and a sensory neuron.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.