| Pronunciation: | | `melu'townin
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 WordNet Dictionary |
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| | Definition: | |
[n] hormone secreted by the pineal gland |
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MELATONIN is a 9 letter word that starts with M. |
| | See Also: | | hormone, internal secretion |
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| Biology Dictionary |
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| | Definition: | | This hormone is produced by the pineal gland (located at the center of the brain) at night. It is believed to regulate the body's biological clock and reproductive cycles and has been found to improve the quality of sleep in elderly insomniacs. |
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