英语词汇melatonin的起源、历史背景-英语词源词典

词汇	melatonin
词源	melatonin n. chemical formed in the pineal gland of mammals that regulates certain physiological activities, 1958, from Greek melas "black, dark" (see melano-) + ending from serotonin. So called because its secretion is inhibited by sunlight, or because it changes the skin color of certain reptiles and amphibians. Entries linking to melatonin melano- word-forming element meaning "black," from Greek melano-, combining form of melas (genitive melanos) "black, dark, murky,"probably from a PIE root *melh-"black, of darkish color" (source also of Sanskrit malinah "dirty, stained, black," Lithuanian mėlynas"blue," Latin mulleus "reddish"). serotonin n. neurotransmitting chemical, 1948, coined from sero-, combining form of serum (q.v.) + ton(ic) + chemical suffix -in (2). updated on December 19, 2018
随便看	outgoing outgrow outgrowth outgun out-herod outhouse outie outing outlander outlandish outlast outlaw outlawry outlay outlet outlier outline outlive outlook outlying outmaneuver outmoded outness outnumber outpatient

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melatonin n.