We don't have synonyms for melatonins yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are melatonin and melanins.
(n) :
Any material similar in its chemistry and effect to the natural hormone.
(n) :
A hormone, related to serotonin, that is secreted by the pineal gland, and stimulates colour change in the skin of reptiles, and is involved in the sleep and wake and reproductive cycles in mammals.
(n) :
Any material similar in its chemistry and effect to the natural hormone.
(n) :
A hormone, related to serotonin, that is secreted by the pineal gland, and stimulates colour change in the skin of reptiles, and is involved in the sleep and wake and reproductive cycles in mammals.