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the anterior and largest part of the brain, consisting of two halves or hemispheres and serving to control voluntary movements and coordinate mental actions.
the forebrain and the midbrain.
Contemporary Examples

Historical Examples

noun (pl) -brums, -bra (-brə)
the anterior portion of the brain of vertebrates, consisting of two lateral hemispheres joined by a thick band of fibres: the dominant part of the brain in man, associated with intellectual function, emotion, and personality See telencephalon
the brain considered as a whole
the main neural bundle or ganglion of certain invertebrates

1610s, from Latin cerebrum “brain” (see cerebral).

cerebrum cer·e·brum (sěr’ə-brəm, sə-rē’-)
n. pl. cer·e·brums or cer·e·bra (-brə)
The largest portion of the brain, including practically all the parts within the skull except the medulla, pons, and cerebellum and now usually referring only to the parts derived from the telencephalon and including mainly the 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.
(sěr’ə-brəm, sə-rē’brəm)
Plural cerebrums or cerebra
The largest part of the vertebrate brain, filling most of the skull and consisting of two cerebral hemispheres divided by a deep groove and joined by the corpus callosum, a transverse band of nerve fibers. The cerebrum processes complex sensory information and controls voluntary muscle activity. In humans it is the center of thought, learning, memory, language, and emotion.
cerebrum [(ser-uh-bruhm, suh-ree-bruhm)]

The largest part of the brain, consisting of two lobes, the right and left cerebral hemispheres. The cerebrum controls thought and voluntary movement. (See cerebral cortex, left brain, and right brain.)


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    cerebral amyloid angiopathy n. A pathological condition of small cerebral vessels characterized by deposits of amyloid in the vessel walls which may lead to infarcts or hemorrhage.

  • Cerebral anesthesia

    cerebral anesthesia n. Loss of sensation due to a lesion in the cerebrum.

  • Cerebral aqueduct

    cerebral aqueduct n. A short canal in the cerebrum, lined with ependymal cells and leading downward through the mesencephalon from the third to the fourth ventricle. Also called sylvian aqueduct.

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