See Also: melatonin(medicine)
Melatonin(health)
melatonin(dictionary)
melatonin(encyclopedia)
melatonin(dictionary)
melatonin deacetylase(medicine)
melatonin (oh)
[Date: 1900-2000; Language: Greek; Origin: melas 'black' + English serotonin]
a hormone that is sometimes used as a drug to help you sleep
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