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Definition of CEREBRAL HEMISPHERE. : either of the two hollow convoluted lateral halves of the cerebrum â see brain illustration.
â¢ RIGHT HEMISPHERE (noun). The noun RIGHT HEMISPHERE has 1 sense: 1. the cerebral hemisphere to the right of the corpus callosum that controls the left half of the body. Familiarity information: RIGHT HEMISPHERE used as a noun is very rare. RIGHT HEMISPHERE (noun). The noun RIGHT HEMISPHERE has 1 sense: 1. the cerebral hemisphere to the right of the corpus callosum that controls the left half of the body. Familiarity information: RIGHT HEMISPHERE used as a noun is very rare.