1. A worm; any structure or part resembling a worm in shape. 2. [TA] V. cerebelli, the narrow middle zone between the two hemispheres of the cerebellum; the portion projecting above the level of the hemispheres on the upper surface is called the superior v.; the lower portion, sunken between the two hemispheres and forming the floor of the vallecula, is the inferior v.. [L. worm]
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1) either of two parts of the median lobe of the cerebellum:
2) the median lobe or part of the cerebellum
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n.
the central portion of the cerebellum, lying between its two lateral hemispheres and immediately behind the pons and the medulla oblongata of the hindbrain.
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ver·mis (vurґmis) [L. “wormâ€] a wormlike structure, particularly the vermis cerebelli.Medical dictionary. 2011.