What does cerebrum mean?
The cerebrum is the largest and most prominent division of the brain, made up of two hemispheres covered by the folded cerebral cortex. It is the seat of the mind's highest functions: conscious thought, language, memory, perception, reasoning, and the control of voluntary movement. In humans it accounts for the great majority of the brain's volume, and its deeply wrinkled surface allows a vast area of neural tissue to fit within the skull. The word belongs primarily to anatomical, medical, and scientific registers — clinicians might speak of damage to the cerebrum after a stroke, while neuroscientists discuss its lobes and hemispheres. Outside these fields, most speakers simply say "brain." Precise and descriptive rather than emotive, "cerebrum" is nonetheless valuable for anyone reading about neurology or psychology, and it anchors a whole family of related words such as "cerebral," which extends figuratively to describe intellectual activity of any kind.
nounThe cerebrum is the largest and most highly developed part of the brain, consisting of two hemispheres and responsible for higher functions such as thought, reasoning, memory, and voluntary movement.
- The large, uppermost part of the vertebrate brain, comprising two hemispheres and the cerebral cortex, responsible for conscious thought, sensation, memory, and voluntary action.
"The frontal region of the cerebrum governs planning and decision-making."
"Injury to the left hemisphere of the cerebrum can impair speech and language processing."
"The anatomy lecture traced how the folds of the cerebrum dramatically increase the surface area of the cortex."
The everyday English plural "cerebrums" is standard; scientific writing often prefers the Latinate "cerebra." Both are acceptable, but "cerebra" appears mainly in comparative anatomy.
"The researchers compared the cerebra of several mammalian species under the microscope."
Weighing in at roughly 85% of your brain's total mass, the cerebrum is the wrinkled command centre behind every thought you've ever had.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cerebrum
"Cerebrum" comes directly from Latin "cerebrum," meaning "brain," a word of uncertain deeper origin that has been linked to the same ancient root as Greek "kara" (head) and Sanskrit "śiras." The term entered English in the early seventeenth century as anatomists adopted Latin terminology for describing the nervous system. Its Latin root lives on across English in words like "cerebral," "cerebellum," and "cerebrospinal," all referring to structures or qualities of the brain.
Related word forms
How cerebrum is actually used
"Cerebrum" is a technical term used chiefly in anatomy, medicine, neuroscience, and academic writing; in everyday speech people almost always say "brain" instead. The plural is "cerebrums", though "cerbera" is occasionally seen in very formal scientific contexts — "cerebra" is the more standard Latin-derived plural in technical usage. It carries no emotional connotation but lends an authoritative, clinical tone to writing.
Easily confused with cerebrum
The cerebrum handles higher cognitive functions such as reasoning and language, while the cerebellum, located at the back of the brain, coordinates balance and fine motor movement.
Despite the similar spelling, 'cereal' refers to a grain crop or breakfast food and has no connection to the brain.