serotonin

[ ser-uh-toh-nin, seer- ]

noun

, Biochemistry.

1. a neurotransmitter, derived from tryptophan, that is involved in sleep, depression, memory, and other neurological processes.

serotonin

/ ˌsɛrəˈtəʊnɪn /

noun

1. 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)

serotonin

/ sĕr′ə-tō′nĭn,sîr′- /

1. 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.

Word History and Origins

Origin of serotonin¹

First recorded in 1945–50; sero- + tone + -in ²

Word History and Origins

Origin of serotonin¹

from sero- + ton ( ic ) + -in

Example Sentences

“One of the suspected causes of seasonal affective disorder is decreased serotonin production due to lowered exposure to sunlight,” she said.

From Los Angeles Times

A healthy microbiome normally produces neurotransmitters and metabolites, such as serotonin and butyrate, that influence mood and cognitive performance.

From Salon

In the years since, researchers have come up with a number of underlying factors that might increase a baby’s risk of SIDS, including problems in the part of the brain that controls breathing, abnormal serotonin receptors, and low levels of an enzyme connected to sleep arousal.

From Los Angeles Times

In between, the body and brain are depleted of fluids and serotonin, while everything you bring collects a layer of corrosive alkaline dust that follows you home.

From Los Angeles Times

The pharmacological market is dominated by two classes of drugs known as selective serotonin reuptake inhibitors and serotonin and norepinephrine reuptake inhibitors.

From Slate