neurotransmitter
noun
neu·ro·trans·mit·ter
ˌnu̇r-ō-tran(t)s-ˈmi-tər 
-tranz-,
ˌnyu̇r-
: a substance (such as norepinephrine or acetylcholine) that transmits nerve impulses across a synapse
Examples of neurotransmitter in a Sentence
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The Role of Antidepressants SSRIs, or selective serotonin reuptake inhibitors, work by increasing levels of serotonin, a neurotransmitter associated with mood and focus, and by blocking the serotonin transporter (SERT), which typically regulates how much serotonin is available outside our cells.
—
Jenny Lehmann, Discover Magazine, 22 May 2025
Researchers found that in utero exposure to phthalates is linked with altered metabolism of neurotransmitters and amino acids involved in brain maturation, according to a study published Wednesday in the journal Nature Communications.
—Kristen Rogers, CNN Money, 2 Apr. 2025
One of these neurotransmitters is called glutamate.
—David Oliver, USA Today, 16 May 2025
Low levels of these neurotransmitters can lead to various problems, including anxiety, depression and trouble focusing.
—Kristen Rogers, CNN Money, 2 Apr. 2025
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Jenny Lehmann, Discover Magazine, 22 May 2025
Researchers found that in utero exposure to phthalates is linked with altered metabolism of neurotransmitters and amino acids involved in brain maturation, according to a study published Wednesday in the journal Nature Communications.
—Kristen Rogers, CNN Money, 2 Apr. 2025
One of these neurotransmitters is called glutamate.
—David Oliver, USA Today, 16 May 2025
Low levels of these neurotransmitters can lead to various problems, including anxiety, depression and trouble focusing.
—Kristen Rogers, CNN Money, 2 Apr. 2025
See All Example Sentences for neurotransmitter
Cite this Entry
“Neurotransmitter.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/neurotransmitter. Accessed 7 Jun. 2025.
Copy CitationKids Definition
neurotransmitter
noun
neu·ro·trans·mit·ter
ˌn(y)u̇r-ō-tran(t)s-ˈmit-ər
-tranz-
: a substance (as acetylcholine) that carries a nerve impulse from one neuron to another across a synapse
Medical Definition
neurotransmitter
noun
neu·ro·trans·mit·ter
ˌn(y)u̇r-ō-tran(t)s-ˈmit-ər, -tranz-
: a substance (as norepinephrine or acetylcholine) that transmits nerve impulses across a synapse see false neurotransmitter
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