Definition of melatonin in English:

melatonin

noun ˌmɛləˈtəʊnɪnˌmɛləˈtoʊnən

mass nounBiochemistry

A hormone secreted by the pineal gland which inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle.
〔生化〕褪黑激素
Example sentencesExamples
- Cherries are also a great source of melatonin, a hormone that your body uses to regulate its sleep patterns.
- Delaying sleep on weekends delays the nightly secretion of melatonin, the sleep hormone.
- The pineal gland hormone, melatonin, is one of the endproducts regulated by the circadian system.
- Bright light in the morning affects your levels of the hormone melatonin.
- Research has found the pineal hormone melatonin is low in migraine patients.

Origin

1950s: from Greek melas 'black' + serotonin.

Definition of melatonin in US English:

melatonin

nounˌmeləˈtōnənˌmɛləˈtoʊnən

Biochemistry

A hormone secreted by the pineal gland which inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle.
〔生化〕褪黑激素
Example sentencesExamples
- Delaying sleep on weekends delays the nightly secretion of melatonin, the sleep hormone.
- Cherries are also a great source of melatonin, a hormone that your body uses to regulate its sleep patterns.
- Bright light in the morning affects your levels of the hormone melatonin.
- The pineal gland hormone, melatonin, is one of the endproducts regulated by the circadian system.
- Research has found the pineal hormone melatonin is low in migraine patients.

Origin

1950s: from Greek melas ‘black’ + serotonin.

单词	melatonin
释义	Definition of melatonin in English: melatonin noun ˌmɛləˈtəʊnɪnˌmɛləˈtoʊnən mass nounBiochemistry A hormone secreted by the pineal gland which inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle. 〔生化〕褪黑激素 Example sentencesExamples Cherries are also a great source of melatonin, a hormone that your body uses to regulate its sleep patterns. Delaying sleep on weekends delays the nightly secretion of melatonin, the sleep hormone. The pineal gland hormone, melatonin, is one of the endproducts regulated by the circadian system. Bright light in the morning affects your levels of the hormone melatonin. Research has found the pineal hormone melatonin is low in migraine patients. Origin 1950s: from Greek melas 'black' + serotonin. Definition of melatonin in US English: melatonin nounˌmeləˈtōnənˌmɛləˈtoʊnən Biochemistry A hormone secreted by the pineal gland which inhibits melanin formation and is thought to be concerned with regulating the reproductive cycle. 〔生化〕褪黑激素 Example sentencesExamples Delaying sleep on weekends delays the nightly secretion of melatonin, the sleep hormone. Cherries are also a great source of melatonin, a hormone that your body uses to regulate its sleep patterns. Bright light in the morning affects your levels of the hormone melatonin. The pineal gland hormone, melatonin, is one of the endproducts regulated by the circadian system. Research has found the pineal hormone melatonin is low in migraine patients. Origin 1950s: from Greek melas ‘black’ + serotonin.
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