Definition of serotonin in English:

serotonin

Syllabification: ser·o·to·nin
Pronunciation: /ˌsirəˈtōnən, ˌserəˈtōnən
 
/

noun

Biochemistry
A compound present in blood platelets and serum that 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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