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pineal

noun
🔊/paɪˈniːəl/
🔊/paɪˈniːəl/
(also pineal gland)
(anatomy解剖学)
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  1. a small organ in the brain that releases a hormone松果体；松果腺
    Word Originlate 17th cent.: from French pinéal, from Latin pinea ‘pine cone’. The current anatomical usage refers to the shape of the gland.