neuromodulator

[noo r-oh-moj-uh-ley-ter]
noun Biochemistry.
  1. any of various substances, as certain hormones and amino acids, that influence the function of neurons but do not act as neurotransmitters.

Origin of neuromodulator

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018