melatonin

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mel·a·to·nin

(mĕl′ə-tō′nĭn)

An animal hormone, C₁₃H₁₆N₂O₂, 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.

[Greek melās, black + ton(e) + -in.]

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

melatonin

(ˌmɛləˈtəʊnɪn)

(Biochemistry) the hormone-like secretion of the pineal gland, causing skin colour changes in some animals and thought to be involved in reproductive function

[C20: probably from mela(nocyte) + (sero)tonin]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

mel•a•to•nin

(ˌmɛl əˈtoʊ nɪn)

n.

a hormone secreted by the pineal gland in inverse proportion to the amount of light received by the retina, important in regulating biorhythms.

[1955–60; < Greek mélā(s) black + tone + -in¹]

melatonin

A hormone influencing the onset of puberty, the menstrual cycle, and the body’s daily activity cycle. See also pineal gland.

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Noun

melatonin - hormone secreted by the pineal gland

endocrine, hormone, internal secretion - the secretion of an endocrine gland that is transmitted by the blood to the tissue on which it has a specific effect

Translations

melatonin

n melatonina

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References in periodicals archive ?

And when tested in combination with six different chemotherapy drugs (for a variety of different types of cancer), using melatonin (20 mg/day) in addition to the drugs resulted in:

Melatonin: A Promising Protector Against Breast Cancer

Objective: To find out the effect of melatonin as adjunct therapy on outcome of admitted newborns presenting with hypoxic ischaemic encephalopathy.

Role of melatonin in management of hypoxic ischaemic encephalopathy in newborns: A randomized control trial

Melatonin administration shows promise in the management of periodontal diseases.

Melatonin in Periodontal Diseases-A Review

Two components of foods that are shown to be most helpful in improving sleep quality are melatonin and tryptophan.

Foods That Help You Sleep and Foods That Keep You Up at Night: Fiber-rich foods, as well as those with melatonin and tryptophan, can help you fall asleep

I'm talking about melatonin. And when you hear about all of the things that researchers are discovering about melatonin, you're going to be absolutely amazed.

Melatonin Isn't Just for Sleeping--From Cardiovascular Disease and Cancer to Aging and Macular Degeneration the Research Will Shock You

Objective: To explore the nephropreventive effects of melatonin on vancomycin-induced nephrotoxicity in rabbits.

STUDY OF PREVENTIVE EFFECT OF MELATONIN ON HIGH DOSE VANCOMYCIN INDUCED NEPHROTOXICITY IN RABBITS

Melatonin (N-acetyl-5-methoxytryptamine) is an important lipophilic amine hormone that is secreted by the pineal gland and considered a powerful free radical scavenger It plays a critical role in the physiology of the ovary in the reproductive system [1].

Effect of Melatonin on the Expression of VEGF-A and on the Degeneration of Follicle Reserve in Rat Ovary

[USA], May 16 (ANI): Melatonin is a hormone known to promote sleep but ever wondered how?

How melatonin helps you get some 'zzz'

Melatonin is said to be a synthetic form of a naturally occurring hormone in a person's body, produced by the pineal, which regulates circadian rhythms, that controls the body's sleep cycle.

Daycare Workers Gave Melatonin Gummies To Kids Before Nap Time

THE BLUE light emitted from our cellphones, tablets and laptops can interfere with melatonin production, so many people purchase melatonin as an oral supplement to help them fall asleep.

SKIN CARE'S NEW ACTIVE IS TOPICAL MELATONIN

Traditional nonprescription melatonin supplements have been available for more than two decades.