[noo r-oh-trans-mit-er, -tranz-, nyoo r-] /ˌnʊər oʊˈtræns mɪt ər, -ˈtrænz-, ˌnyʊər-/

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.
a chemical by which a nerve cell communicates with another nerve cell or with a muscle

1961, from neuro- + transmitter.

neurotransmitter neu·ro·trans·mit·ter (nur’ō-trāns’mĭt-ər, -trānz’-, nyur’-)
Any of the various chemical substances, such as acetylcholine, that transmit nerve impulses across a synapse.
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.

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.


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