Definition of serotonin
: 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
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Origin and Etymology of serotonin
sero- + tonic + 1-in
First Known Use: 1948
Medical Dictionary
Medical Definition of serotonin
: 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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