<p><strong>Noun</strong></p><ul><li>a large portion of the brain, serving to coordinate voluntary movements, posture, and balance in humans, being in back of and below the cerebrum and consisting of two lateral lobes and a central lobe</li></ul><p><strong>Plural</strong></p><ul><li>cer·e·bel·lums, cer·e·bel·la</li></ul><p><strong>Contextual Usage</strong></p><ul><li>a dog, usually represented as having three heads, that guarded the entrance of the infernal regions</li><li>a formidable and often surly keeper or guard</li></ul>