cer·e·brum 
(sĕrə-brəm, sə-rē-)
(sĕrə-brəm, sə-rē-)n. pl. cer·e·brums or cer·e·bra (-brə)
The large rounded structure of the brain occupying most of the cranial cavity, divided into two cerebral hemispheres that are joined at the bottom by the corpus callosum. It controls and integrates motor, sensory, and higher mental functions, such as thought, reason, emotion, and memory.
[Latin, brain; see ker-1 in the Appendix of Indo-European roots.]