Melatonin meaning

mĕlə-tōnĭn
A hormone, C13 H16 N2 O2 , derived from serotonin and produced by the pineal gland. It stimulates color change in the epidermis of amphibians and reptiles and plays a role in the function of circadian rhythms and estrous cycles in mammals.
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A hormone, C13H16N2O2, produced by the pineal body, that lightens skin pigmentation, inhibits estrus, etc.: its secretion is inhibited by sunlight.
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An animal hormone, C13 H16 N2 O2 , derived from serotonin and produced by the pineal gland. It stimulates color change in the skin of amphibians and reptiles and plays a role in regulating circadian rhythms and reproductive cycles in mammals. It is also found in plants and fungi.
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A hormone produced in the pineal gland that plays a role in regulating biological rhythms, including sleep and reproductive cycles. In many animals, melatonin also regulates the physiological effects that occur in response to seasonal changes, such as the growth of a winter coat of fur. Chemical formula: C13H16N2O2.
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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/wake and reproductive cycles in mammals.
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Any material similar in its chemistry and effect to the natural hormone.
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Origin of melatonin

  • Greek melās black ton(e) –in

    From American Heritage Dictionary of the English Language, 5th Edition

  • From the beginning of melanin + the ending of serotonin

    From Wiktionary