Definition of Pineal gland
Pineal gland: A small gland located deep within in the brain. It is believed to secrete melatonin, and may therefore be part of the body's sleep-regulation apparatus.
Source: MedTerms™ Medical Dictionaryhttp://www.medterms.com/script/main/art.asp?articlekey=4904
Last Editorial Review: 3/26/1998 2:28:00 PM
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