cerebellum

詳細解釋：

cer.e.bel.lum

n.（名詞）
【複數】 cer.e.bel.lums 或 cer.e.bel.la [-bμl.…]
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.
小腦：腦的三裂葉狀組織，位於腦橋和延髓之後腦半球的枕葉下面，負責調節和協調複雜的自發肌肉運動，同時負責保持身體姿勢的平衡

來源：
Medieval Latin
中世紀拉丁語
from Latin [diminutive of] cerebrum [brain] * see ker-
源自 拉丁語 [] cerebrum的小後綴 [腦] *參見 ker-

【引伸】
cer.ebel.lar