melatonin
A hormone, related to serotonin, that is secreted by the pineal gland, and stimulates…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 and wake and reproductive cycles in mammals.
» Melatonin helps to regulate circadian rhythms.
mexicanhere · Tatoeba · CC BY 2.0 FRMeaning
2 senses(uncountable, usually)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 and wake and reproductive cycles in mammals.
Melatonin
мелатони́нmelatonín
мелатоні́нmelatonín
hormone secreted by the pineal gland
(uncountable, usually)Any material similar in its chemistry and effect to the natural hormone.
Examples
2 sentencesMelatonin helps to regulate circadian rhythms.
The pineal gland secretes melatonin.
Translations
8 languagesBy meaning 1
By meaning 1
By meaning 1
Origin
From mela- + tone + -in, ultimately from Ancient Greek μέλας (mélas, “black, dark”).From mela- + tone + -in, ultimately from Ancient Greek μέλας (mélas, “black, dark”).
Wiktionary, CC BY-SA 4.0 · source
Forms
plural: melatonins| Singular | melatonin |
|---|
uncountable
Word family
1 related wordsLessons for this word
1 lessons- A1Countable and uncountable nouns — Because it can be uncountable