- a neurotransmitter, derived from tryptophan, that is involved in sleep, depression, memory, and other neurological processes.
Origin of serotonin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for serotonin
Once your serotonin levels are back up to normal, they can make enough melatonin so you can sleep better, says Dr. Rindfleisch.10 Reasons You’re Exhausted and What to Do About It
April 25, 2014
Spaghetti squash also contains specific nutrients that help convert the tryptophan in other foods you eat into serotonin.6 Healthy Foods to Fight the Flu, Beat Stress and More
February 5, 2014
Flooding your brain with dopamine and serotonin, it not only heightens feelings of euphoria, but empathy and love as well.Molly: The Dangerous Drug That’s Too Good to Quit
September 8, 2013
Besides dopamine, serotonin might play a role, too, researchers say, as well as other brain chemicals and receptors.In Praise of Tourette's
November 22, 2009
Those drugs are SSRIs—serotonin uptake inhibitors—and they spin their mood magic by elevating levels of serotonin in the brain.Anti-Depressant Nation
October 5, 2008
- a compound that occurs in the brain, intestines, and blood platelets and acts as a neurotransmitter, as well as inducing vasoconstriction and contraction of smooth muscle; 5-hydroxytryptamine (5HT)
from sero- + ton (ic) + -in
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Word Origin and History for serotonin
Online Etymology Dictionary, © 2010 Douglas Harper
- An organic compound formed from tryptophan and found in animal and human tissue, especially the brain, blood serum, and gastric mucous membranes, and active in vasoconstriction, stimulation of the smooth muscles, transmission of impulses between nerve cells, and regulation of cyclic body processes.5-hydroxytryptamine
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
- A monoamine substance that is formed from tryptophan and found in many animal tissues, including the intestine and central nervous system. In the brain, serotonin acts as a neurotransmitter that is involved in the control of pain perception, the sleep-wake cycle, and mood. Serotonin is also produced in some bacteria and plants.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.