neurotransmitter [ n oo r-oh- trans-mit-er, - tranz-, ny oo r- ] SHOW IPA / ˌnʊər oʊˈtræns mɪt ər, -ˈtrænz-, ˌnyʊər- / PHONETIC RESPELLING EXAMPLES | WORD ORIGIN noun 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.
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
Examples from the Web for neurotransmitter British Dictionary definitions for neurotransmitter noun a chemical by which a nerve cell communicates with another nerve cell or with a muscle
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Word Origin and History for neurotransmitter
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Medicine definitions for neurotransmitter neurotransmitter [ nur′ō-trănz ′mĭt-ər, -trăns ′- ] n. Any of the various chemical substances, such as acetylcholine, that transmit nerve impulses across a synapse.
The American Heritage® Stedman's Medical Dictionary
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Science definitions for neurotransmitter 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.
The American Heritage® Science Dictionary
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Culture definitions for neurotransmitter
Any one of a number of chemicals that are used to transmit
nerve signals across a synapse. They are sprayed from the end of the “upstream” nerve cell and absorbed by receptors in the “downstream” cell. Note
Drugs like Prozac and alcohol affect the emission and reception of neurotransmitters.
The New Dictionary of Cultural Literacy, Third Edition
Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.