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Definition of CEREBRAL HEMISPHERE. : either of the two hollow convoluted lateral halves of the cerebrum â see brain illustration.
Noun. 1. right brain-the cerebral hemisphere to the right of the corpus callosum that controls the left half of the body. right hemisphere. cerebral hemisphere, hemisphere-either half of the cerebrum.. right brain-the cerebral hemisphere to the right of the corpus callosum that controls the left half of the body. right hemisphere. cerebral hemisphere, hemisphere-either half of the cerebrum.