Dictionary
neu•ro•trans•mit•ter
Pronunciation: (noor"ō-trans'mit-ur, -tranz'-, nyoor"-), [key]—
n.
any of several chemical substances, as epinephrine or acetylcholine, that transmit nerve impulses across a synapse to a postsynaptic element, as another nerve, muscle, or gland.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.