Definitions for Melatonin
ˌmɛl əˈtoʊ nɪnmela·tonin

Princeton's WordNetRate this definition:0.0 / 0 votes

1. melatoninnoun

   hormone secreted by the pineal gland

GCIDERate this definition:0.0 / 0 votes

1. melatoninnoun

   A hormone secreted by the pineal gland. Chemically it is N-acety-5-methoxytryptamine. Research has indicated that there are daily rhythms in secretion of melatonin, in particular due to the depressing effect on melatonin production by light received by the retina. Conversely it appears that melatonin may influence the circadian rhythms of animals. There is some experimental evidence that administration of melatonin may increase the amount of sleep in people with sleep disorders. However, the evidence is not convincing and the effect is not profound. Nevertheless, the deregulation of melatonin and its availability over-the-counter has led to many people taking melatonin to help sleep, without consulting a physician.

WiktionaryRate this definition:0.0 / 0 votes

1. melatoninnoun

   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

2. melatoninnoun

   Any material similar in its chemistry and effect to the natural hormone.

WikipediaRate this definition:0.0 / 0 votes

1. Melatonin

   Melatonin is a natural product found in plants and animals. It is primarily known in animals as a hormone released by the pineal gland in the brain at night, and has long been associated with control of the sleep–wake cycle.In vertebrates, melatonin is involved in synchronizing circadian rhythms, including sleep–wake timing and blood pressure regulation, and in control of seasonal rhythmicity including reproduction, fattening, moulting and hibernation. Many of its effects are through activation of the melatonin receptors, while others are due to its role as an antioxidant. In plants, it functions to defend against oxidative stress. It is also present in various foods.Melatonin was discovered in 1958.In addition to its role as a natural hormone, melatonin is used as a dietary supplement and medication in the treatment of sleep disorders such as insomnia and circadian rhythm sleep disorders; for information on melatonin as a supplement and medication, see the melatonin as a medication and supplement article.

ChatGPTRate this definition:0.0 / 0 votes

1. melatonin

   Melatonin is a hormone produced by the pineal gland in the brain. It is responsible for regulating sleep-wake cycles, commonly referred to as the body's internal clock or circadian rhythm. This hormone's production is influenced by the detection of light and dark by the retina of the eye, increasing in the evening as it gets dark to help encourage sleep and decreasing in the morning light to help you wake up. Melatonin supplements are often used to treat insomnia or jet lag.

WikidataRate this definition:0.0 / 0 votes

1. Melatonin

   Melatonin, is also known chemically as N-acetyl-5-methoxytryptamine, is a naturally occurring compound found in animals, plants, and microbes. In animals, circulating levels of the hormone melatonin vary in a daily cycle, thereby allowing the entrainment of the circadian rhythms of several biological functions. Many biological effects of melatonin are produced through activation of melatonin receptors, while others are due to its role as a pervasive and powerful antioxidant, with a particular role in the protection of nuclear and mitochondrial DNA. The full effects of long-term exogenous supplementation in humans have not yet been ascertained. Melatonin is categorized by the US Food and Drug Administration as a dietary supplement, not a drug. A prescription-only, timed release melatonin product for people aged 55 and over was approved for use by the European Medicines Agency in 2007, despite having shown only small effects, and in Australia in 2009.

U.S. National Library of MedicineRate this definition:0.0 / 0 votes

1. Melatonin

   A biogenic amine that is found in animals and plants. In mammals, melatonin is produced by the PINEAL GLAND. Its secretion increases in darkness and decreases during exposure to light. Melatonin is implicated in the regulation of SLEEP, mood, and REPRODUCTION. Melatonin is also an effective antioxidant.

Editors ContributionRate this definition:0.0 / 0 votes

1. melatonin

   A type of neurotransmitter created in moderation within a living organism and the brain and body of an animal or human being.

   Melatonin is known to play a role in our feelings, patterns and behaviors.

   
   

   Submitted by MaryC on September 6, 2020  

Matched Categories

1. • Hormone

How to pronounce Melatonin?

1. Alex

   US English

   David

   US English

   Mark

   US English

   Daniel

   British

   Libby

   British

   Mia

   British

   Karen

   Australian

   Hayley

   Australian

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   Priya

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   Neerja

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   Zira

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   Oliver

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   Wendy

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   Fred

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   Tessa

   South African

How to say Melatonin in sign language?

Numerology

1. Chaldean Numerology

   The numerical value of Melatonin in Chaldean Numerology is: 8

2. Pythagorean Numerology

   The numerical value of Melatonin in Pythagorean Numerology is: 4

Examples of Melatonin in a Sentence

1. Allison Tallman:

   Consumption in the evening may promote drowsiness, leading to better sleep. Oats also contain melatonin, which can help us to fall asleep as well.

2. Josephine Briggs:

   The changes in the yoga category are very large, i was also struck by the use of melatonin in children.

3. Kaleigh McMordie:

   Walnuts contain several nutrients that promote good sleep, such as melatonin, serotonin, and magnesium. Studies show that eating walnuts increases melatonin in the blood, making walnuts a great bedtime snack, walnuts are also high in omega-3 fatty acids. Animal studies in rats have shown that omega-3 fatty acid deficiency can alter several neurotransmitter pathways, including that of serotonin, affecting depression, anxiety, and sleep.

4. Meenu Singh:

   Displays like laptops, tablets, and phones should not be used for a long time at night because its bright emission suppresses the melatonin.

5. Cora Collette Breuner:

   We don’t secrete melatonin to help us sleep when we’re staring at light.

Popularity rank by frequency of use

References

1. ^ Princeton's WordNet
   http://wordnetweb.princeton.edu/perl/webwn?s=Melatonin
2. ^ GCIDE
   https://gcide.gnu.org.ua/?q=Melatonin
3. ^ Wiktionary
   https://en.wiktionary.org/wiki/Melatonin
4. ^ Wikipedia
   https://en.wikipedia.org/wiki/Melatonin
5. ^ ChatGPT
   https://chat.openai.com
6. ^ Wikidata
   https://www.wikidata.org/w/index.php?search=Melatonin