melatonin

名词 n.
中文释义
英 /ˌmɛləˈtəʊnɪn/    美 /ˌmɛləˈtoʊnɪn/|/ˌmeləˈtəʉnɪn/

英文释义

名词 n.
  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
    — How exactly melatonin relates to sleep is still not understood.
  2. Any material similar in its chemistry and effect to the natural hormone. uncountable,usually

词形变化

melatonins plural

词汇关系

衍生词
melatonergic

词源

From mela- + tone + -in, ultimately from Ancient Greek μέλας (mélas, “black, dark”).
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