serotonin

noun

se·​ro·​to·​nin ˌsir-ə-ˈtō-nən 

ˌser-

: a phenolic amine neurotransmitter C₁₀H₁₂N₂O that is a powerful vasoconstrictor and is found especially in the brain, blood serum, and gastric mucous membrane of mammals

Examples of serotonin in a Sentence

Recent Examples on the Web

Medication side effects: Nonsteroidal anti-inflammatory drugs (NSAIDs) like Motrin (ibuprofen), serotonin receptor agonists like Clozaril (clozapine), and anticancer medications can all affect GI health. —Mark Gurarie, Health, 2 Nov. 2024

The body uses tryptophan to help make melatonin and serotonin. —Nina Turner, Newsweek, 29 Oct. 2024

Pumpkin seeds may be a natural mood balancer thanks to tryptophan, a precursor of serotonin. —Alessandra Signorelli, Vogue, 18 Oct. 2024

Estrogen levels rise and fall unpredictably during perimenopause, which can affect serotonin production and lead to feelings of irritability, anxiety or sadness. —Sandra Rose Salathe, Flow Space, 10 Sep. 2024

Word History

Etymology

sero- + ton(ic) entry 2 or tone entry 1 + -in entry 1, probably after angiotonin, earlier name for angiotensin — more at angiotensin

Note: Term introduced by Maurice M. Rapport, Arda Alden Green and Irvine H. Page in "Crystalline serotonin," Science, vol. 108, Issue 2804 (September 24, 1948), pp. 329-330: "The general behavior of the crystalline substance is suggestive of its homogeneity. We would like provisionally to name it serotonin, which indicates that its source is serum and its activity is one of causing constriction."

First Known Use

1948, in the meaning defined above

Phrases Containing serotonin

• selective serotonin reuptake inhibitor

Medical Definition

serotonin

noun

se·​ro·​to·​nin ˌsir-ə-ˈtō-nən  ˌser- 

: a phenolic amine neurotransmitter C₁₀H₁₂N₂O that is a powerful vasoconstrictor and is found especially in the brain, blood serum, and gastric mucous membrane of mammals

called also 5-HT, 5-hydroxytryptamine