/ Dictionary / Index N neurotransmitter: Meaning and Definition of Find definitions for: 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. See also: neurotransmitter (Thesaurus) neurotransmission neurotrophic Related Content Daily Word Quiz: cur Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language