Wiktionary
neuromodulator
n. (context neuroscience English) A substance other than a neurotransmitter, released by a neuron at a synapse and conveying information to adjacent or distant neurons, either enhancing or dampening their activities.
Usage examples of "neuromodulator".
With this degree of isolation, Kandel could ignore any other sources of inputs to the system being studied -other peripheral nerves, circulating neuromodulators and so forth.