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| pin·e·al gland (plural pin·e·al glands) or pin·e·al bod·y (plural pin·e·al bod·ies) |
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organ secreting melatonin: a small cone-shaped organ of the brain that secretes the hormone melatonin into the bloodstream. It is one of the endocrine glands and is situated beneath the back part of the corpus callosum.
Technical name epiphysis
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