melatonin

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“
This blocks the secretion of melatonin, which is the hormone needed for the immune system to function, and consequently results in general weakness, chronic fatigue, in the face of pathogens attacks, which results in disruption of endocrine functions, and in an increase of absenteeism at work.

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Definitions (3)

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  1. noun A hormone derived from serotonin and produced by the pineal gland that stimulates color change in the epidermis of amphibians and reptiles and plays a role in sleep, aging, and reproduction in mammals.

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Examples (50)

  • Research shows that after melatonin is administered to ADHD patients; the time needed to fall asleep is significantly reduced and this suggests that quick-release melatonin may be more effective than sustained-release formulations for sleep related conditions. —  Find Free Articles - ArticlesBase
  • They found levels of the hormone melatonin, a key driver of the body's daily rhythms, reset much quicker in horses than it did in humans or rodents. —  Horsetalk.co.nz Headlines
  • The medication works by binding to the same receptor as melatonin, and activating it as a direct agonist. —  Brain Blogger
  • A 2005 study at the Massachusetts Institute of Technology found that melatonin, a hormone available over-the-counter at many drug stores, is effective in promoting sleep. —  The Lantern
  • This affects the body's production of melatonin, the sleep hormone, which increases during dark periods. —  theithacajournal.com -
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Etymologies (1)

Toggle American Heritage etymologies American Heritage Dictionary (1)

  1. Greek melās, black + ton(e) + -in.
 

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