Definition of serotonin in English:

serotonin

Line breaks: sero|tonin
Pronunciation: /ˌsɛrəˈtəʊnɪn
 
/

noun

Biochemistry
  • A compound present in blood platelets and serum, which constricts the blood vessels and acts as a neurotransmitter.
    • Alternative name: 5-hydroxytryptamine; chemical formula: C10H12N2O
    More example sentences
    • Tryptophan is an amino acid that serves as a precursor to the neurotransmitter serotonin.
    • These physiological changes decrease patients' pain thresholds and thereby increase pain sensation, anxiety, fear, and the release of pain transmitters, such as histamines, serotonins, kinins, and prostaglandins.
    • These work by raising the levels of the chemicals serotonin and noradrenaline in the brain, which both tend to elevate the mood.

Origin

1940s: from serum + tonic + -in1.

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Word of the day grotesquerie
Pronunciation: grəʊˈtɛskəri
noun
grotesque quality or grotesque things collectively

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