See Also: melatonin(medicine)
Melatonin(health)
melatonin(dictionary)
melatonin(encyclopedia)
melatonin(dictionary)
melatonin deacetylase(medicine)

melatonin (iou)



melatonin noun. M20.
[from MELA(NO- + SERO)TONIN.]
Biochemistry. An indole derivative formed in the pineal gland of various mammals (principally from serotonin), which inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle.