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