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Definition of Pineal gland

Pineal gland: A small gland that is located near the center of the brain. This gland secretes melatonin, and it may therefore be part of the body's sleep-regulation apparatus. Also known as pineal body.

Source: MedTerms™ Medical Dictionary
http://www.medterms.com/script/main/art.asp?articlekey=4904
Last Editorial Review: 3/19/2012

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