英语词汇“melatonin”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	melatonin
释义	WordReference Random House Unabridged Dictionary of American English © 2024 mel•a•to•nin (mel′ə tō′nin),USA pronunciation n. [Physiol.] Biochemistry, Physiologya hormone secreted by the pineal gland in inverse proportion to the amount of light received by the retina, important in the regulation of biorhythms: in amphibians, it causes a lightening of the skin. Greek mélā(s) black + tone + -in² 1955–60
随便看	umbrella pine umbrella plant umbrella skirt umbrella stand umbrella step umbrella tent umbrella tree umbrette umbria umbrian umbriel umbriferous umbriferously umbundu umd ume umeå umfazi umiak uml umlaut umlungu ummah ump umph

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