melatonin — mel a*tonin n. (Physiology) A hormone secreted by the pineal gland. Chemically it is N acety 5 methoxytryptamine. Research has indicated that there are daily rhythms in secretion of melatonin, in particular due to the depressing effect on… … The Collaborative International Dictionary of English
melatonin — (n.) 1958, from Gk. melas black, dark (see MELANIN (Cf. melanin)) + ending from SEROTONIN (Cf. serotonin). So called because its secretion is inhibited by sunlight … Etymology dictionary
melatonin — [mel΄ə tō′nin] n. [ MELA(NO) + TON(IC) + IN1] a hormone, C13H16N2O2, produced by the pineal body, that lightens skin pigmentation, inhibits estrus, etc.: its secretion is inhibited by sunlight … English World dictionary
Melatonin — Not to be confused with Melanin or Melanotan. Melatonin Systematic (IUPAC) name … Wikipedia
Melatonin — Strukturformel Allgemeines Name Melatonin Andere Namen N … Deutsch Wikipedia
melatonin — /mel euh toh nin/, n. Physiol. a 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. [1955 60; … Universalium
Melatonin — A hormone produced by the pineal gland, melatonin is intimately involved in regulating the sleeping and waking cycles, among other processes. Melatonin supplements are sometimes used by people who have chronic insomnia. Always see your doctor… … Medical dictionary
Melatonin — Me|la|to|nin 〈n. 15; unz.; Biol., Med.〉 Hormon der Zirbeldrüse, das bei Amphibien zu einer Aufhellung der Haut führt u. beim Menschen an der Regulation des biolog. Zeitsinnes beteiligt ist [<Melano... + grch. tonos „Spannung“] * * *… … Universal-Lexikon
melatonin — n. a hormone produced by the pineal gland in darkness but not in bright light. Melatonin receptors in the brain, in a nucleus immediately above the optic chiasm, react to this hormone and synchronize the nucleus to the 24 hour day/night rhythm,… … The new mediacal dictionary
melatonin — melatoninas statusas T sritis chemija apibrėžtis Kankorėžinės liaukos hormonas. formulė C₈H₅N(OCH₃)CH₂CH₂NHCOCH₃ atitikmenys: angl. melatonin rus. мелатонин ryšiai: sinonimas – 3 (2 etanoilaminoetil) 5 metoksiindolas … Chemijos terminų aiškinamasis žodynas
