neu·ro·trans·mit·ter (n r  -tr ns m t- r, -trnz-, nyr-)n. A chemical substance, such as acetylcholine or dopamine, that transmits nerve impulses across a synapse. |
| neurotransmitter (nr-trnzmt-r) A chemical substance that is produced and secreted by a neuron and then diffuses across a synapse to cause excitation or inhibition of another neuron. Acetylcholine, norepinephrine, dopamine, and serotonin are examples of neurotransmitters. |
ThesaurusLegend: Synonyms Related Words Antonyms
| Noun | 1. | neurotransmitter - a neurochemical that transmits nerve impulses across a synapse Adrenalin, adrenaline, epinephrin, epinephrine - a catecholamine secreted by the adrenal medulla in response to stress (trade name Adrenalin); stimulates autonomic nerve action GABA, gamma aminobutyric acid - an amino acid that is found in the central nervous system; acts as an inhibitory neurotransmitter neurochemical - any organic substance that occurs in neural activity acetylcholine - a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems |
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