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

Next, in 1976, it was proposed that DMT might be a neurotransmitter, akin to serotonin and dopamine, that has a functional role in the body. —Oshan Jarow, Vox, 4 Nov. 2024

Several bodily processes involve serotonin, including blood clotting, sleep, appetite, and memory. —Kirstyn Hill, Pharmd, Mph, Health, 27 Oct. 2024

Sunlight provides us with vitamin D and plays a crucial role in regulating the production of serotonin and dopamine, two key neurotransmitters. —Dominique Fluker, Essence, 1 Oct. 2024

When estrogen levels drop, so do serotonin levels, increasing the likelihood of migraine. —Lori Youmshajekian, WIRED, 23 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