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Definition of CEREBRAL HEMISPHERE. : either of the two hollow convoluted lateral halves of the cerebrum â see brain illustration.
Definition of cerebral. 1  1a : of or relating to the brain or the intellectb : of, relating to, affecting, or being the cerebrum cerebral edema cerebral arteries. 2  2a : appealing to intellectual appreciation cerebral dramab : primarily intellectual in nature a cerebral society books for cerebral readers.