Webster's English Dictionary

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cerebrum

ce.re.brum \s*-'re--br*m, 'ser-*-br*m\ \-br*\ n or cerebrums or ce.re.bra 
   [L] pl  1: BRAIN  2: an enlarged anterior or upper part of the brain :  2a: 
   the forebrain and midbrain with their derivatives  2b: FOREBRAIN  2c: the 
   expanded anterior portion of the brain that in higher mammals overl ies the 
   rest of the brain, consists of cerebral hemispheres and connecting 
   structures, and is held to be the seat of conscious mental processes : 
   TELENCEPHALON