Dividing the two hemispheres is the corpus callosum, a white matter that forms a line between the hemispheres. Despite dividing them, the corpus callosum allows the two areas to communicate with each other.
The left portion of the cortex involves processes that are responsible for reasoning and language abilities while the right side functions for creativity and spatial perceptions.
See corpus callosum in Webster's New World College Dictionary
Origin: ModL, lit., callous body
See corpus callosum in American Heritage Dictionary 4
noun pl. corpora cal·lo·sa (kə-lōˈsə)
Origin:
Origin: New Latin corpus callōsum
Origin: : Latin corpus, body
Origin: + Latin callōsum
Origin: , neuter of callōsus, callous
.Learn more about corpus callosum