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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With less morning light, your body may produce lower amounts of the hormone serotonin, which elevates our moods.
—
Janet Loehrke, USA TODAY, 2 Mar. 2025
May support relaxation: Certain foods, such as those rich in tryptophan or magnesium, may promote the production of the hormone melatonin and the neurotransmitter serotonin, helping with relaxation and sleep quality.
—Lauren Panoff, Mph, Rd, Verywell Health, 28 Feb. 2025
For instance, levels of serotonin, a neurotransmitter that reduces negative feelings, decrease as night approaches.
—Hannah Singleton, Health, 20 Feb. 2025
So to get not only the full song but the entire video was almost too much serotonin to bear.
—Christopher Rosa, Glamour, 14 Feb. 2025
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Janet Loehrke, USA TODAY, 2 Mar. 2025
May support relaxation: Certain foods, such as those rich in tryptophan or magnesium, may promote the production of the hormone melatonin and the neurotransmitter serotonin, helping with relaxation and sleep quality.
—Lauren Panoff, Mph, Rd, Verywell Health, 28 Feb. 2025
For instance, levels of serotonin, a neurotransmitter that reduces negative feelings, decrease as night approaches.
—Hannah Singleton, Health, 20 Feb. 2025
So to get not only the full song but the entire video was almost too much serotonin to bear.
—Christopher Rosa, Glamour, 14 Feb. 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 16 Mar. 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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