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
Recent Examples on the Web
Others point to inflammation, the way the brain processes sensory input, and changes in serotonin levels – which play a key role in activating migraine.
—
Danielle Wilhour, The Conversation, 10 July 2025
Plus, studies have shown that the gut also controls up to 90% of our serotonin production, and can have a marked impact on mood regulation.
—Morgan Fargo, Vogue, 9 July 2025
Research from the study Embrace the Sun with Dr. Grant Lambert shows brain serotonin production increases along with several other health benefits linked directly to sunlight exposure.
—Charell G. Coleman, Forbes.com, 1 July 2025
Bright, overhead lighting stimulates serotonin production, enhancing alertness and boosting our mood and energy levels, perfect for kitchens and workspaces, but not ideal for intimate social settings.
—Sophie Flaxman, Better Homes & Gardens, 15 June 2025
See All Example Sentences for serotonin
Examples are automatically compiled from online sources to
show current usage.
Read More
Opinions expressed in the examples do not represent those of Merriam-Webster or its editors.
Send us feedback.
Danielle Wilhour, The Conversation, 10 July 2025
Plus, studies have shown that the gut also controls up to 90% of our serotonin production, and can have a marked impact on mood regulation.
—Morgan Fargo, Vogue, 9 July 2025
Research from the study Embrace the Sun with Dr. Grant Lambert shows brain serotonin production increases along with several other health benefits linked directly to sunlight exposure.
—Charell G. Coleman, Forbes.com, 1 July 2025
Bright, overhead lighting stimulates serotonin production, enhancing alertness and boosting our mood and energy levels, perfect for kitchens and workspaces, but not ideal for intimate social settings.
—Sophie Flaxman, Better Homes & Gardens, 15 June 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 20 Jul. 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
Love words? Need even more definitions?
Merriam-Webster unabridged
Share