What Does It Mean?

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From our dictionary:
ce•re•bral

(su-rē'brul, ser'u-), [key]
adj.,

1. Anat., Zool. of or pertaining to the cerebrum or the brain.
2. betraying or characterized by the use of the intellect rather than intuition or instinct: His is a cerebral music that leaves many people cold.
3. Phonet. retroflex (def. 2).

—n.
Phonet. a cerebral sound.