Serotonin
//ˌsɛɹəˈtəʊnɪn// noun
noun ·Uncommon ·Advanced level
Definitions
Noun
- 1 An indoleamine neurotransmitter, 5-hydroxytryptamine, that is involved in depression, appetite, etc., and is crucial in maintaining a sense of well-being, security, etc. countable, uncountable
"Notably, mouse lines targeting genes codifying for serotonin receptors, for enzymes involved in 5-HT synthesis as Tph1 and Tph2, in its metabolism as monoaminoxidase A (MAOA) or in its re-uptake as serotonin transporter (SERT), have been generated."
- 2 a neurotransmitter involved in e.g. sleep and depression and memory wordnet
Example
More examples"This medication influences the amount of serotonin in the brain."
Etymology
From sero- + tone + -in.
Related phrases
More for "serotonin"
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.