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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Mood changes: High protein with insufficient carbohydrates may impact serotonin (a feel-good hormone) levels, affecting mood and energy levels.17
Great Food Sources
Protein is found in almost every food (including broccoli), but some foods are better sources than others.
—
Lauren Panoff, Mph, Rd, Verywell Health, 18 Apr. 2025
There's no surer cure for the blues than a shot of serotonin straight to the heart in the form of one of the best rom-coms of all time.
—Elizabeth Logan, Glamour, 14 Apr. 2025
Accordingly, there are some tense moments, but mostly A League of Their Own concerns lusting after a young Tom Hanks and watching Madonna and Rosie O’Donnell run around in period softball costumes—a.k.a. instant serotonin.
—Emma Specter, Vogue, 6 Apr. 2025
Exercise can boost levels of the hormones serotonin and dopamine, both of which can improve your overall mood and feelings of well-being.
—Wendy Wisner, Health, 31 Mar. 2025
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Lauren Panoff, Mph, Rd, Verywell Health, 18 Apr. 2025
There's no surer cure for the blues than a shot of serotonin straight to the heart in the form of one of the best rom-coms of all time.
—Elizabeth Logan, Glamour, 14 Apr. 2025
Accordingly, there are some tense moments, but mostly A League of Their Own concerns lusting after a young Tom Hanks and watching Madonna and Rosie O’Donnell run around in period softball costumes—a.k.a. instant serotonin.
—Emma Specter, Vogue, 6 Apr. 2025
Exercise can boost levels of the hormones serotonin and dopamine, both of which can improve your overall mood and feelings of well-being.
—Wendy Wisner, Health, 31 Mar. 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 30 Apr. 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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