WordReference Random House Learner's Dictionary of American English © 2014
neuro-, prefix. 
neuro- comes fom Greek, where it has the meaning "nerve, nerves.'' Its meaning now includes "nervous system,'' and this meaning is found in such words as:neurology, neurotic.

Collins Concise English Dictionary © HarperCollins Publishers::

neuro-, (before a vowel)neur- combining form
  1. indicating a nerve or the nervous system: neuroblast, neurology
Etymology: from Greek neuron nerve; related to Latin nervus

'neuro-' also found in these entries:
In the English description:

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