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melatonin

Noun CEFR B2
ˌmɛləˈtəʊnɪn

Definitions

  1. 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.
    uncountable, usually
  2. Any material similar in its chemistry and effect to the natural hormone.
    uncountable, usually

Equivalents

Españolmelatonina
Françaismélatonine
DeutschMelatonin
10 more languages

Examples

“How exactly melatonin relates to sleep⟳ is still not understood.”
“Melatonin production can be delayed or arrested by even brief flashes of bright light⟳ entering the eye, research⟳ has shown.”

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
See all B2 English words →

See also

melatope melatroctolite melaxuma Melayu Melb Melba

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