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Definition of serotonin

serotonin

/ˌsɛr.əˈtoʊ.nɪn/
ser · o · to · nin
Adjective:serotonergic
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serotonin Lexical Profile

serotonin Game Scores & Validity

• noun

1

A monoamine compound present in blood platelets, the digestive tract, and the central nervous system that functions as both a neurotransmitter and a vasoconstrictor, playing a vital role in regulating mood, sleep, appetite, and digestion.

Example

"Regular physical exercise and exposure to sunlight can naturally boost the brain's production of serotonin."

• Rhymes for serotonin

• Nearby Words

sermonette
sermonize
sermonizer
serotonin
serow
serpae tetra
serpent

Word Origin & Etymology

Coined in 1948 by American biochemist Maurice M. Rapport and his colleagues from the Latin 'serum' (blood fluid) and Greek 'tonos' (stretching or tension), because the compound was first discovered as a substance in blood serum that caused blood vessels to constrict.

Cite this Entry

Wordmom. (2026). Definition of Serotonin. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/serotonin
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