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BNC: 0 COCA: 20581

melatonin

noun
/ˌmeləˈtəʊnɪn/
/ˌmeləˈtəʊnɪn/
[uncountable] (biology生物)
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  1. a hormone that helps regulate (= control) waking and sleeping in humans and animals, and which is sometimes used to treat insomnia (= the condition of being unable to sleep)褪黑(激)素
    Word Origin1950s: from Greek melas ‘black’ + serotonin.
BNC: 0 COCA: 20581
BNC: 0 COCA: 20581
BNC: 0 COCA: 20581
melatonin
Hormones and chemicals in the body:adrenalin, endorphin, estrogen...

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