What does cerebellum mean?
The cerebellum is the major structure of the hindbrain, situated at the back and lower part of the skull beneath the cerebrum. Its name comes from Latin, meaning 'little brain,' reflecting its folded, brain-like appearance. Though it accounts for only about a tenth of the brain's volume, it contains more than half of its neurons, packed densely into its finely wrinkled surface. The cerebellum's primary role is to coordinate voluntary movement: it fine-tunes muscle activity, maintains balance and posture, and enables smooth, precise actions such as walking, writing, or playing an instrument. It also contributes to certain cognitive functions, including language and attention. Damage to the cerebellum—as from injury, stroke, or alcohol abuse—typically results in unsteady gait, tremor, and impaired coordination rather than paralysis or loss of sensation. In medicine, related conditions are described with the adjective 'cerebellar,' as in cerebellar ataxia. The word is a formal anatomical term, most often encountered in scientific and medical writing.
nounThe large, ridged structure at the back of the brain, below the cerebrum, responsible for coordinating voluntary movement, balance, and posture.
- The region of the hindbrain that coordinates voluntary movement, balance, and posture.
"Damage to the cerebellum can impair a person's balance and fine motor control."
"The surgeon carefully avoided the cerebellum during the delicate operation."
"Alcohol affects the cerebellum first, which is why drinking impairs coordination."
Both plurals are accepted; 'cerebella' follows the Latin pattern and appears mainly in scholarly or medical writing, while 'cerebellums' is the ordinary English plural.
"Comparative studies examined the cerebella of several mammalian species."
Despite making up only about 10% of the brain's volume, the cerebellum contains more than half of all its neurons.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of cerebellum
The word 'cerebellum' comes directly from Latin, where it literally means 'little brain,' being the diminutive of 'cerebrum' (brain). It entered English as an anatomical term in the early modern period, when Latin was the standard language of scientific description. Its root, the Latin 'cerebrum,' also gives English 'cerebral' and 'cerebrum', making these true cognates within the same word family of brain-related terminology.
Related word forms
How cerebellum is actually used
A formal anatomical term used chiefly in medical, scientific, and educational contexts. The adjective form 'cerebellar' is more common in clinical writing (e.g., cerebellar ataxia). Plural is 'cerebellums' or, in technical usage, 'cerebella'.
Easily confused with cerebellum
The cerebrum is the large, uppermost part of the brain responsible for higher functions like thought and language, while the cerebellum is the smaller structure beneath it that coordinates movement and balance.