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	nature naturelike nature reserve nature's call nature study nature trail nature walk nature worship nature worshiper naturism naturist naturopathic naturopathy naucratis naugahyde naugatuck naught naughtily naughtiness naughty naumachia naumachy naumannite nauplial nauplius

英语词典包含188688条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。