serotonin
noun
se·ro·to·nin
ˌsir-ə-ˈtō-nən 
ˌser-
: a phenolic amine neurotransmitter C10H12N2O that is a powerful vasoconstrictor and is found especially in the brain, blood serum, and gastric mucous membrane of mammals
Examples of serotonin in a Sentence
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Although the exact link between B6 and anxiety is unclear, research suggests that vitamin B6 relieves anxiety and fear by regulating the production of serotonin and gamma-aminobutyric acid (GABA).
—
Emmanuella Ogbonna, Health, 19 May 2025
Moving our bodies releases serotonin and endorphins and improves our hippocampus function.
—Jessica Dulong, CNN Money, 12 May 2025
TCAs, like amitriptyline (Elavil), are primarily used to treat depression but also work by increasing the levels of certain neurotransmitters like serotonin and norepinephrine in the brain and spinal cord.
—New Atlas, 22 Apr. 2025
Time in nature An indoor, sedentary lifestyle does not increase endorphins and serotonin.
—Ana Morales, Vogue, 7 Apr. 2025
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Emmanuella Ogbonna, Health, 19 May 2025
Moving our bodies releases serotonin and endorphins and improves our hippocampus function.
—Jessica Dulong, CNN Money, 12 May 2025
TCAs, like amitriptyline (Elavil), are primarily used to treat depression but also work by increasing the levels of certain neurotransmitters like serotonin and norepinephrine in the brain and spinal cord.
—New Atlas, 22 Apr. 2025
Time in nature An indoor, sedentary lifestyle does not increase endorphins and serotonin.
—Ana Morales, Vogue, 7 Apr. 2025
See All Example Sentences for serotonin
Cite this Entry
“Serotonin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/serotonin. Accessed 7 Jun. 2025.
Copy CitationMedical Definition
serotonin
noun
se·ro·to·nin
ˌsir-ə-ˈtō-nən
ˌser-
ˌser-
: a phenolic amine neurotransmitter C10H12N2O that is a powerful vasoconstrictor and is found especially in the brain, blood serum, and gastric mucous membrane of mammals
called also 5-HT, 5-hydroxytryptamine
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