neu·ron (nrŏn′, nyr-)
1. Any of the impulse-conducting cells that constitute the brain, spinal column, and nerves in vertebrates, consisting of a nucleated cell body with one or more dendrites and a single axon.
2. A similar impulse-conducting cell in invertebrates.In both senses also callednerve cell.
[Greek, sinew, string, nerve; see (s)neəu- in the Appendix of Indo-European roots.]
neuro·nal(nrə-nəl, nyr-, n-rōnl, ny-), neu·ronicadj.
(click for a larger image)neuron
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