noun Uncommon

serotonin

seh-ruh-TOH-nihn

Serotonin (noun) means a brain chemical that helps regulate mood, appetite, and feelings of well-being. Example: “Exercise is known to boost serotonin levels naturally.”

noun

A brain chemical that helps regulate mood, appetite, and feelings of well-being.

"Exercise is known to boost serotonin levels naturally."

"Low serotonin is linked to symptoms of depression."

How to use serotonin

Learner’s notes

In plain EnglishA chemical messenger in the brain that helps control mood and happiness.

Easily confused with

dopamine →

Common pairings

serotonin levels boost serotonin serotonin reuptake

Word forms

serotonins plural

Study it as flashcards or scroll it in Flow — saved to your collection.

Test yourself on “serotonin” A quick quiz — meaning, synonyms & usage →

Fill the gap

Can you complete this real example?

Exercise is known to boost _____ levels naturally.

Etymology

Coined from "sero-" (from serum) plus "tone" and the chemical suffix "-in."

Synonyms

View more →

5-hydroxytryptamine

Rhymes for serotonin

ronin

See all rhymes for serotonin →

Frequently asked questions

What does “serotonin” mean?

The word “serotonin” means a brain chemical that helps regulate mood, appetite, and feelings of well-being. In plain terms, a chemical messenger in the brain that helps control mood and happiness.

How do you pronounce “serotonin”?

“Serotonin” is pronounced seh-ruh-TOH-nihn (/ˌsɛɹəˈtoʊnɪn/ in IPA).

How do you use “serotonin” in a sentence?

Here is “serotonin” used in a sentence: “Exercise is known to boost serotonin levels naturally.”

What part of speech is “serotonin”?

“Serotonin” is a noun.

Is “serotonin” a common word?

“Serotonin” is an uncommon word in modern English.