n. pl. cer·e·bel·lums or cer·e·bel·la (-bĕlə)
The trilobed structure of the brain, lying posterior to the pons and medulla oblongata and inferior to the occipital lobes of the cerebral hemispheres, that is responsible for the regulation and coordination of complex voluntary muscular movement as well as the maintenance of posture and balance.
[Medieval Latin, from Latin, diminutive of cerebrum, brain; see ker-1 in the Appendix of Indo-European roots.]
cer′e·bellar (-bĕlər) adj.
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Indo-European & Semitic Roots Appendices
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