melatonin
noun
mel·a·to·nin
ˌme-lə-ˈtō-nən 
: a vertebrate hormone that is derived from serotonin, is secreted by the pineal gland especially in response to darkness, and has been linked to the regulation of circadian rhythms
Examples of melatonin in a Sentence
Recent Examples on the Web
Fans of the Sleepy Girl Mocktail will be happy to learn that Dr. Cohen confirms it can even be layered with other sleep-promoting ingredients such as melatonin, magnesium, or valerian.
—
Kylie Gilbert, Glamour, 19 Nov. 2024
Cherries, bananas, nuts, milk, and whole grains contain sleep-promoting nutrients like melatonin, tryptophan, potassium, and magnesium, which are also ideal for nighttime snacking.3
1.
—Jillian Kubala, Health, 4 Nov. 2024
In 2022, Yo-El Ju, a neurologist and sleep medicine specialist at Washington University in St. Louis, shared five foods that are naturally rich in melatonin:
Nuts, especially walnuts
Fish, particularly salmon
Eggs
Tart cherries
Cow’s milk
2.
—Renée Onque, CNBC, 2 Nov. 2024
But what is the best time to take a melatonin supplement for a good rest?
—Michael Franco, New Atlas, 4 Nov. 2024
See all Example Sentences for melatonin 
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Kylie Gilbert, Glamour, 19 Nov. 2024
Cherries, bananas, nuts, milk, and whole grains contain sleep-promoting nutrients like melatonin, tryptophan, potassium, and magnesium, which are also ideal for nighttime snacking.3
1.
—Jillian Kubala, Health, 4 Nov. 2024
In 2022, Yo-El Ju, a neurologist and sleep medicine specialist at Washington University in St. Louis, shared five foods that are naturally rich in melatonin:
Nuts, especially walnuts
Fish, particularly salmon
Eggs
Tart cherries
Cow’s milk
2.
—Renée Onque, CNBC, 2 Nov. 2024
But what is the best time to take a melatonin supplement for a good rest?
—Michael Franco, New Atlas, 4 Nov. 2024
See all Example Sentences for melatonin
Dictionary Entries Near melatonin
Cite this Entry
“Melatonin.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/melatonin. Accessed 1 Dec. 2024.
Copy CitationKids Definition
melatonin
noun
mel·a·to·nin
ˌmel-ə-ˈtō-nən
: a hormone that is secreted by the pineal gland especially in response to darkness and has been linked to the regulation of bodily functions or activities (as sleep) that occur in approximately 24 hour cycles
Medical Definition
melatonin
noun
mel·a·to·nin
ˌmel-ə-ˈtō-nən
: a vertebrate hormone C13H16N2O2 that is derived from serotonin, is secreted by the pineal gland especially in response to darkness, and has been linked to the regulation of circadian rhythms
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