Source : Webster's Revised Unabridged Dictionary (1913)

Cerebrum \Cer"e*brum\, n.; pl. E. {Cerebrums}, L. {Cerebra}.
   [L., the brain.] (Anat.)
   The anterior, and in man the larger, division of the brain;
   the seat of the reasoning faculties and the will. See
   {Brain}.

Source : WordNet®

cerebrum
     n : anterior portion of the brain consisting of two hemispheres;
         dominant part of the brain in humans
     [also: {cerebra} (pl)]