səˈrēbrəm, ˈserəb- noun
( plural cerebrums -rəmz ; or cere·bra -rə)
Etymology: Latin, brain — more at cerebral
1.
a. : brain 1a — now used chiefly figuratively or affectedly
b. : an enlarged anterior or upper part of the brain:
(1) : all the brain anterior to the isthmus : the forebrain and midbrain with their derivatives
(2) : forebrain 1b
(3) : the two cerebral hemispheres — see brain illustration
2. : the chief cephalic ganglion of an invertebrate : supra-esophageal ganglion