noun🔗ShareA 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/wake and reproductive cycles in mammals"Many people take melatonin supplements to help them fall asleep more easily at night. "physiologybiochemistrymedicinebiologysubstancebodyorganChat with AIVocabulary GamePractice Reading
noun🔗ShareAny material similar in its chemistry and effect to the natural hormone."Taking a low dose of melatonin before bed can help some people fall asleep easier. "medicinephysiologybiochemistrybodysubstancechemistryChat with AIVocabulary GamePractice Reading
