serotonin: meaning, definition, pronunciation and examples
MediumTechnical / Scientific / Medical; also common in popular science and general wellness discourse.
Quick answer
What does “serotonin” mean?
A chemical substance produced in the brain and other parts of the body that functions as a neurotransmitter, carrying signals between nerve cells, and is often associated with feelings of well-being and happiness.
Audio
Pronunciation
Definition
Meaning and Definition
A chemical substance produced in the brain and other parts of the body that functions as a neurotransmitter, carrying signals between nerve cells, and is often associated with feelings of well-being and happiness.
A monoamine neurotransmitter derived from tryptophan, primarily found in the gastrointestinal tract, blood platelets, and the central nervous system. It regulates mood, appetite, sleep, memory, learning, and various other physiological processes. Imbalances are linked to conditions like depression, anxiety, and migraines.
Dialectal Variation
British vs American Usage
Differences
No significant differences in meaning or usage. Spelling and pronunciation are consistent.
Connotations
Identical in both varieties. The popular science association with mood is equally strong.
Frequency
Equally common in technical/scientific contexts in both regions. Slightly higher frequency in general media in the US due to extensive direct-to-consumer advertising for medications affecting serotonin.
Grammar
How to Use “serotonin” in a Sentence
Levels of serotoninProduction of serotoninReuptake of serotoninDeficiency in serotoninRole of serotonin in [process]Vocabulary
Collocations
Usage
Meaning in Context
Business
Rare, except in pharmaceutical/ biotech industries discussing drug development (e.g., 'serotonin-based therapeutics').
Academic
Very common in neuroscience, psychology, biology, and medical literature discussing neurochemistry, psychopharmacology, and physiology.
Everyday
Common in discussions about mental health, wellness, diet, and exercise (e.g., 'Sunlight helps your serotonin'). Often simplified.
Technical
The primary context. Precise usage referring to biochemical pathways, receptor subtypes (e.g., 5-HT1A), pharmacokinetics, and clinical conditions.
Vocabulary
Synonyms of “serotonin”
Neutral
Weak
Vocabulary
Antonyms of “serotonin”
Watch out
Common Mistakes When Using “serotonin”
- Calling it a 'hormone' instead of a neurotransmitter/neuromodulator.
- Over-simplifying its role to only 'causing happiness'.
- Misspelling as 'seretonin', 'seratonine'.
- Incorrect pronunciation stressing the first syllable: /ˈsɛrəˌtoʊnɪn/.
FAQ
Frequently Asked Questions
No, they are distinct neurotransmitters. Serotonin is more associated with mood regulation, sleep, and digestion, while dopamine is linked to reward, motivation, and motor control.
Not directly. Foods like bananas contain tryptophan, a precursor amino acid, but dietary serotonin does not cross the blood-brain barrier. The brain must synthesize its own serotonin.
A potentially serious drug reaction caused by excessive serotonergic activity in the central nervous system, often due to drug interactions. Symptoms include agitation, confusion, rapid heart rate, and high temperature.
Approximately 90% of the body's serotonin is found in the enterochromaffin cells of the gastrointestinal tract, where it regulates intestinal movements.
A chemical substance produced in the brain and other parts of the body that functions as a neurotransmitter, carrying signals between nerve cells, and is often associated with feelings of well-being and happiness.
Serotonin is usually technical / scientific / medical; also common in popular science and general wellness discourse. in register.
Serotonin: in British English it is pronounced /ˌsɛrəˈtəʊnɪn/, and in American English it is pronounced /ˌsɛrəˈtoʊnɪn/. Tap the audio buttons above to hear it.
Learning
Memory Aids
Mnemonic
Think: SERene + TONe + INside. A SERene TONe INside you creates calm and happiness, like serotonin.
Conceptual Metaphor
THE BRAIN'S MOOD THERMOSTAT / A CHEMICAL MESSENGER OF WELL-BEING / THE BODY'S INTERNAL BALANCE REGULATOR
Practice
Quiz
Which of the following is a primary function of serotonin?