Look up: Melatonin

1. Melatonin
   Produced from serotonin, melatonin is released by the pineal gland into the bloodstream. It affects physiological changes related to time and lighting cycles.
   Found on http://www.bbc.co.uk/radio4/reith2003/gl
   
   
2. melatonin
   [n] - hormone secreted by the pineal gland
   Found on http://www.webdictionary.co.uk/definitio
   
   
3. Melatonin
   is a hormone produced in the pineal gland. See melatonin under Circadian rhythm.
   Found on http://www.bcpa.co.uk/glossary.htm
   
   
4. Melatonin
   Hormone which regulates our biological clock. Used as a treatment for sleep disorders.
   Found on http://www.researchautism.net/glossary.i
   
   
5. Melatonin
   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 before taking melatonin, as it is not recommended for all patients with sleep problems.
   Found on http://www.medterms.com/script/main/art.
   
   
6. melatonin
   (= N-acetyl 5-methoxytryptamine) A hormone secreted by the pineal gland. In lower vertebrates causes aggregation of pigment in melanophores, and thus lightens skin. In humans believed to play a role in establishment of circadian rhythms, and purported to help overcome the effects of jet-lag.
   Found on http://www.encyclo.co.uk/visitor-contrib
   
   
7. melatonin
   <hormone> A hormone secreted by the pineal gland. ... In lower vertebrates causes aggregation of pigment in melanophores and thus lightens skin. In humans believed to play a role in establishment of circadian rhythms. ... (13 Nov 1997) ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
8. melatonin
   noun hormone secreted by the pineal gland
   Found on http://wordnetweb.princeton.edu/perl/web
   
   
9. melatonin
   (mel″ә-to´nin) an indoleamine hormone synthesized and released by the pineal body during the hours of darkness; it may have a role in the control of the regulation of gonadotropin release.
   Found on http://www.encyclo.co.uk/local/21001
   
   
10. melatonin
    hormone secreted by the pineal gland, a tiny endocrine gland situated at the centre of the brain. Melatonin was discovered in 1958 by American ... [3 related articles]
    Found on http://www.britannica.com/eb/a-z/m/67
    
    
11. melatonin
    melatonin: see pineal gland.
    Found on http://www.infoplease.com/ce6/sci/A09161
    
    
12. melatonin
    Type: Term Pronunciation: mel′ă-tōn′in Definitions: 1. a substance formed by the mammalian pineal gland, which appears to depress gonadal function in mammals and causes contraction of amphibian melanophores; a precursor is serotonin. Melatonin is rapidly metabolized and is take...
    Found on http://www.medilexicon.com/medicaldictio
    
    
13. Melatonin
    Melatonin is a hormone produced in the pineal gland, a small gland in the brain, that helps regulate sleep and wake cycles. Very small amounts of melatonin are found in foods such as meats, grains, fruits, and vegetables. Normally, melatonin levels begin to rise in the mid
    Found on http://www.wholisticmedical.co.uk/glossa
    
    
14. melatonin
    (mel;ua-to;nin) A hormone secreted by the pineal gland that produces lightening of the skin in lower vertebrates and that may contribute to the regulation of gonadal function in mammals. Secretion follows a circadian rhythm and peaks at night.
    Found on http://www.mhhe.com/biosci/abio/glossary
    
    
15. melatonin
    (mel;ua-to;nin) A hormone secreted by the pineal gland that produces lightening of the skin in lower vertebrates and that may contribute to the regulation of gonadal function in mammals. Secretion follows a circadian rhythm and peaks at night.
    Found on http://www.mhhe.com/biosci/abio/glossary
    
    
16. melatonin
    A hormone made by the pineal gland (tiny organ near the center of the brain). Melatonin helps control the body
    Found on http://www.cancer.gov/dictionary?expand=
    
    
17. Melatonin
    `Melatonin` (), also known chemically as `N-acetyl-5-methoxytryptamine`, is a naturally occurring compound found in animals, plants and microbes.<ref name="Caniato2003">--><ref name="Paredes2009">--> In animals, circulating levels of the hormone melatonin vary in a d...
    Found on http://en.wikipedia.org/wiki/Melatonin
    
    
18. Melatonin
    (album) `Melatonin` is Jonathan Seet`s first album, released independently in 2000. Track listing: # "Just Like Me" – 4:13 # "I Miss You" – 5:29 # "Fade, My Angel" – 5:36 # "Methadone" – 4:40 # "Small Craft" ...
    Found on http://en.wikipedia.org/wiki/Melatonin