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Pineal gland

small endocrine gland found in most vertebrates, which produces melatonin; in humans, located in the epithalamus, in a groove where the two halves of the thalamus join; its shape and size resembles a pine nut, after which it is named

Pronunciation
/ˈpɪnɪəl ɡland/
/paɪˈniəl ɡlænd/
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