Meaning of SEROTONIN

Pronunciation:			`seru'townin
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WordNet Dictionary
	Definition:		[n]  a neurotransmitter involved in e.g. sleep and depression and memory
	Synonyms:		5-hydroxytryptamine
	See Also:		monoamine neurotransmitter
Medical Dictionary
	Definition:		A neurotransmitter involved in the processes of sleep and memory, as well as other neurological functions.
Biology Dictionary
	Definition:		A hormone, also called 5-hydroxytryptamine, which has the chemical formula C10H12N2O. It is produced in the pineal gland and found in blood platelets, the digestive tract, and the brain. It is both a neurotransmitter (a substance that transmits nerve signals from neuron to neuron) and a vasoconstrictor (a substance that causes the blood vessels to narrow).